You can already A/B them easily. I did not buy a single NeuralDSP plugin when they were on sale last year because they did not do anything I can't get of Helix Native or the ML Sound Lab plugins I already own.
If loading them in a DAW is a bit annoying and complicated, try a live VST host software like Cantabile 3, Gig Performer or Main Stage. They are meant more towards live use and I like using Cantabile 3 as a simple late night practice setup. I have a couple of presets saved with different plugin setups and just load one of those. The paid versions of Cantabile 3 offer even more features to play with.
Messed with the SLO plugin a good bit and it's really good! Easy to use, good sounding fx, good sounding amp sim. If I wanted a SLO sound on something this would be the one to get.
Well that was a roller-coaster.