That's actually exactly what I was thinking. I do appreciate recommendations, but I'm looking more for the information I need to pick a mod on my own. Like, for example, what makes the DNA200 top of the line? What advantages does it have over other chipsets, like the one in the Fuchai? When you go up in price, are you mainly just paying for build quality/reliability/trusted name or are there extra features? I'm getting the feeling that the chipset is the main way to get a basic idea of the quality and features of a mod. Is this a safe assumption to make? Oh, and as for my setup, I don't have any regulated devices (I'm assuming that was just a typo). I've just been running a 5 wrap 24 gauge dual coil in a Freakshow atty on a single Sony VTC4. Also, I'm not too worried about getting something that "hits like a mech", considering that most dual 18650 boxes should top out at a higher wattage than my current mech. And since one of you asked for a budget, I don't really have a strict one. For what vaping is worth to me though, I'd prefer not to spend over 75 bucks.
Well it can go back and forth on a lot of things but a DNA board, lets just go with the 200. One is a finalized spec and device you see with a DNA inside is going to for the most part as far as interface and management is going to be exactly the same. Because of that its very very very predictable. From there they do everything right almost every aspect of it is adjustable (though through software). It power delivery is perfect and flat. It as long as the devices internal resistance is accounted for correctly (apparently an issue on one or two companies who use it) its spot on compared most other companies in finding the correct resistance of an atty. To the point of people taking a DNA devices read out of resistance as the defacto resistance of a coil. Sense it's just a chip made by just a chip supplier, there is are tons of different form factors and mods that can use the chip. Where as you might only be able to find a handful that act the same way even from the same manufacturer. The biggest and only real downside outside cost is several important settings have to made in software and uploaded to the device. Though it has 8 different memory options for storing these. It's also updatable with a strong update history.
From there you go with Yihi. Another high end chip manufacturer. They also make their own devices. It uses a pulses to module the temp control. But as quality chip the pulses are generally so quick you can't feel it in the vape. Its updatable. But there is a tendency for them to create a new chip for new use cases rather than add something to their menu. Everything is controlled on the device. It's basically on level with DNA in terms of quality but does things a little differently here and there. Also DNA is very demanding of power levels and battery compatibilities. It's why they require 3 cells (Lipo or 18650) for 200w. Yihi doesn't do that and even themselves offer a 2 18650 thats rated at 200 watts. Think of it as designer Chinese.
From there its generally downhill but gently. A Wismec/Joytech/Eleaf chip is pretty strong. But the devices themselves aren't necessarily the best built. Way to much zinc. Weighs tons for what the devices are. And have problems like cooling on the Centurian, pins that get stuck down after using long 510 pinned atty's. The power delivery is generally good on power. But can be pulsy or inconsistent in TC. They have a strong list of upgradable devices. The bonus is Wismec wants to make everything. So they partner up with anyone that is willing. Since they are generally manufacturing the device and the chip. They don't have any restrictions that most companies would on implementation. So they can be some of the most creative on device design.
A company like Sigelei seems to be as far as I can tell an over ambitious smaller company. Their best mods seem to be when they were using Yihi chips. But now they can come up with great mods. But their chips can be glitchy. The 213 for example is a great small 2 18650 device that seems to be built with great quality in mind. Its battery management and on device feedback is great. Its power delivery down to the lowest levels of the battery charge is commendable. But the chip is glitchy as all hell. They wrote the TCR (TC where it tries to figure out temp by using manual settings for the increase in resistance based on increase coil temp) to use F. Since the first DNA Temp control everyone has been using C based temp information for this function (regardless if you have F or C set for vaping). F in theory would be a better unit of measurement to base resistance change on. But they didn't tell anyone until the problems got worse and worse. They didn't tell anyone how necessary the preheat setting was for getting TC up and running. You can't press the fire button the exact same second the device goes to sleep or it won't fire. If you press the up button and fire button at the exact same time from sleep to get to the preheat menu, the screen shows the out dated main screen and the preheat screen at the same time making it all sorts of garbled. The last two are easy to avoid issues and the TCR issue is an issue in the sense that everyone else uses different settings so you have to train yourself for one single device. On top of that getting the right resistance read in temp control can be an issue. So while everything else could be perfect in terms of its temp monitoring, how it handles the limiting aspect, and it's overall power delivery could be perfect. It has so many hoops to go through that the device is really only good an extremely small and extremely powerfull dual battery VW device. Also there is an annoyance with the fact that most people thought that it was firmware updatable but it's not, or at least saying its not because they don't want to be stuck constantly trying to rewrite the firmware to fix an issue. Since they never outright said it was it's a bit easier to swallow considering the mess that went down with Smok with the Koopour.
Then you see stuff like this on other devices like a Tesla or Smok. Tons of oddities, quirks, or just completely shady practices that you have to wonder about. Luckily most of these other products are priced in wismec territory so you don't always have to feel bad about trying them out. I don't know how good a Vapepresso Tarot 200w is. But at $50 it isn't horribly priced. Chances are it isn't as good as my DNA 200 device. But for a reasonable size dual 18650, it's a third of the price of a DNA product.
Also chips aren't everything. An IPV has tons more issues than I have ever seen a Yihi Class M or ML have. Even in the DNA world there can be other issues outside just chip usage so a Lavabox vs. a Vaporshark vs. Hcigar vs. and Axis and can all have their own issues or annoyances that another one from device to another.