Both are the same price at 189. They each have their own advantages such as wireless charging and temp sensing on the vaporshark and 60 watt capability and nice form factor on the sxmini. Which would you choose between the two and why?
Juice leakage getting into the sx mini buttons, come on now, maybe its time to dump those Chinese atty's you are using!

I don't have an SX Mini but I do have mods with the SX350 chip which is not all that dissimilar to the the SX Mini chip. The SX350 chips are a different breed than the YiHi chips used in less expensive mods. They are very high quality, accurate, reliable chips.
If you are picky about taste I would suggest going with the rDNA40 and putting in the effort to learn to build with Ni200 in order to use it's temperature protection feature. Before receiving my rDNA40 I pretty much dismissed temperature protection as something that would not be particularly useful to me personally as I could not recall my last dry hit.
However, using temperature protection for just a few hours completely changed my mind. It produces a completely consistent tasting vape start to finish. I also like being able to adjust the temperature and wattage to get the balance of taste/vapor production I prefer for any particular juice or just for what type of vape seems appealing to me at the moment. I ordered a second rDNA40 and it's doubtful I would consider a mod without temperature protection in the future.
That said, temperature protection won't do didley to turn a DNA40 into a 60 watt vape so if you prefer a higher power vape the SX Mini would be what you want. I know several very experienced vapers who have SX Minis and they all love them.
I think if you purchase on the basis of the features that are important to you that you will be very happy either the SX Mini or the rDNA40.
This is where i am with current mod selection. I want a DNA 40 device... but really with it was a DNA 80 device (or something more than 60 watts). Just need a tiny bit more power to be completely satisfied with all of my atomizers. Touch decision because i keep hearing so many good things about temperature protection.
It depends on whether you want to use temp control for the fun of it or to eliminate dry hits/ burning your wick.
I mostly use RDAs or a lemo and generally set mine to a temperature I know won't burn my wick at all (~450F, while it goes up to 600F) so 40W is enough to get it to that temperature I find. If I had it set to the same 450ish temp and it had 80 watts it would just cut in and limit it quicker, and I don't find at the current power level it takes too long to get that hot.
I had similar thoughts to you before I got a DNA 40 device and now I just think it's a slightly different style of vaping, so I guess depends if you get on with it.
I still sometimes get out a mech mod with a pretty low ohm kanthal build in an RDA (don't usually go below 0.3ohms) for a hotter vape with more clouds.
This is where i am with current mod selection. I want a DNA 40 device... but really with it was a DNA 80 device (or something more than 60 watts). Just need a tiny bit more power to be completely satisfied with all of my atomizers. Touch decision because i keep hearing so many good things about temperature protection.
What i meant by completely satisfied with all my atomizers is... i want to use temp control for RTAs... higher wattage, no temp protection for RDAs. I'd just ideally like something that can do both. I really think Evolv is falling behind. I'm not a huge fan of the Chinese chips... but hell, they're even starting to use temperature protection in 100+ watt devices! Evolv needs to... well, evolve if it want's to remain relevant in the next few years.
It might not be for you then. For most vapers, 40w is more than enough. 50w+ devices are more for a niche market (hardcore drippers and cloud chasers).