I gave the new UA versions a quick chance, and really liked what I heard. The grey version seemed to be the most colorful on vocals, the LA-2 version worked great on an acoustic lead (probably due to the faster attack time) and also had a ton of color, the silver face was also much improved.
The newest IK versions sound a bit harsh to me (I disappointingly prefer the original IK LA-2A/1176 without the tube/transformer modelling to the new ones), and I wasn't getting that here with the new UA versions.
So far, I only tried them out on an acoustic mix with two guitars and a vocal. Next up will be an electric bass test (which is my favorite use for the hardware). If it holds up much better than my existing options there, I'll probably buy it.
The Cakewalk version is a non-starter for me until there's a demo to try. Sorry Cakewalk.