Just some thoughts as I revisit Helix Native (as a sanity check if I really want the Stadium).
The newer models are quite good and imo mostly comparable to fractal counterparts. I do find the fractal models still have a weight or depth to them that still just makes it more fun to play.
Some amps like the MKIV are just so different. To me, the Helix Mark IV sounds bad and nothing like the IV on the FAS or how I recall my mark IV sounding. But then again, the helix ENGL Fireball model is absolutely killer. It just seems very hit or miss.
The reverbs in fractal land are noticably better along with the dynacabs. I haven't really jived with the cabs in Helix and often just opt for an IR.
Again, this is on Native so you have to consider input gain.
All in all, I will need to do some more digging. I really hope they release Augora clips before launch or at least an A/B from some YTers. Of course there is always the return window but alas.