I have a Baby Bullet. All the BS hysteria to the contrary, it IS, I repeat IS, vented at the switch. To satisfy all the chicken-littles and give them some visual hand-holding, Altsmoke is starting to drill holes in them as well, so it's not an issue. I'll be interested to see how many complaints start coming in from people who get liquid in their battery holders through these holes.
If you like to play with numbers and chase vaping Nirvana, the BB is not for you. Get a VV model. If you don't mind a cheap, shoddy knockoff, go for the bolt. If the thought of regulation circuits going out on you doesn't bother you, go for it. But if you want a super reliable PV that you could likely give to your grandchildren, get the BB. If you want a PV that you'd choose for the one device you'd take to that apocryphal "desert island", get the BB. I have had mine for 2 years and it was my exclusive PV. I am a chain vaper. It literally almost never left my hand for 16 hours a day. I work at home if front of a computer, so was in front of me when I ate, played and worked. After about 6-8 months or so, yes, a thin line of black coating came off around the connector. It's about 1mm wide. If you wipe leaky juice off, like I didn't do, it might be a year or more before that happens. It might not happen at all. I might just use some stripper and turn it into a silver BB because I'm getting tired of black. I'll look forward to painting it again 2 or 3 years hence.
By the time you get that little bit of paint loss on the BB, your Bolt's switch will have failed or the cheap threading will have seized up on you. Altsmoke uses what is referred to as "vandal resistant" switches. AFAIK, nobody else uses this level of hardware. They are used on public intercoms, ATMs and the like. They're rated for 5A, 1,000,000 cycles electrically and 200,000 cycles mechanically and modified for around 3X that rating. I have definitely put far more than 200,000 cycles on mine. The best I can estimate is that I'm well over 350,000 cycles and have yet to experience a misfire. The switch feels just like it did the day I got it and there's not a spot of wear visible on it.
I also got the pass-through option, which is the most unbelievably bulletproof assembly I've ever seen on a PV, so I can also get 5V. So I have 3.7, 5, 6 and 7.4V options. The build quality, precision and wall thickness of the BB makes it the only PV that I wouldn't hesitate to use stacked batteries in.
In short the BB, like the SB, is an over engineered, over built and over-performing piece of gear. The amortized cost of it makes it a steal at twice the price. I chose the BB over the SB simply because it was smaller and, despite all the bells and whistles on all the pretty PV's that have come out in the last couple years, I would do it again in a heartbeat.
To compare a Bolt with a BB or SB is like comparing a Ginsu knife to a Henckels. Freaking ridiculous.