Thoughts:
KFL+/Russian 91%: Best flavor of any RBA I've tried. Deck is tricky to learn and kinda fiddly. Difficult to dissamble and toy with your setup once filled makes it annoying to learn. There will be a lot of trial and error with this device until you learn a setup that works with your materials and to your liking, which makes the design very unfriendly in this regard. Easy filling, side air inlet, looks like a million bucks.
SQuape: Flavor CAN be nearly as good KFL+, clouds are about equal (very good). SQuape is dumb easy to build on. The inverted deck allows the channels to act as a guide. Put your microcoil together and set wrapping rod right in the channels. Thumbscrews allow tool-less attachment of legs, though I'd still recommend a screwdriver. The 'difficult' part of the SQuape is simply the wicking. Sometimes your wicks just won't :/, though it's difficult to understand what is different between a working wick and a non-working one. You can dismantle a SQuape while it's still filled and mess or replace your setup. Huge plus for a beginner. It looks kinda ugly in my opinion, but that isn't really a huge factor for me. The two real negatives with a SQuape in comparison to a KFL+ style RBA are kinda big in my opinion. No airflow adjustment and the air inlets seated in the threading of the 510 connector. That's just a terrible design, outdated, and will obviously cause issues with some devices and is just all-around suboptimal. The wicking thing is kinda a mystery, but I think a quirk of the long vertical channels. The wick has to be precisely there at the top to provide capillary action. Simply a little too much, a cut that isn't precisely neat, or not enough and it just won't work right. Again, these differences are so slight to the eye that you just can't discern a difference between something that wicks right and something that doesn't.
So KFL+/Russian is the recommendation even though it is slightly tougher to initially build on. Stattqualm or a cloner will obviously redesign the SQuape in the future with airflow control and side air inlet and then there will be a real contender to the uncontested KFL deck/chamber/channel design.
Edit: Damn Noscript always turning my formatting into a freaking wall of text!