Subjectively you can compare anything you want and rank your preferences according to your needs, and that's ok.
You can prefer a mini katana to an axe FX 3, because the smaller, the better, fine.
What you shouldn't do is present your personal preferences as if they were universally valid and relevant considerations.
And that's what you can easily read on certain platforms.
Comments like "I keep my tonex one because sounds better and costs 1/10" placed under a YT video or FB post about another product, are flat out stupid and probably just a way to shit over other people choices.
That kind of comment makes sense only if one is trying to replace an whole pedalboard with a product like a QC, tone master pro, etc. But if that's the case the comment/comparison should be much more articulated.
Well you don't need to make a 1:1 comparison between two products that fall under the same category.
Fm9 and helix are the "same" product, they serve the "same" function with the "same" wide array of features: lots of DSP, I/o, flexible routing, lots of foot switches with flexible switching options and they both have modelling for both amps and fx.
They have the same purpose: being a comprehensive all in one modelling/multi FX product that can cover almost any musical and practical need.
They have differences and those differences will be reasons for decisions.
UA amp pedals and fm9, while they both do modeling are not the "same" product because other than being modelling devices they don't share the same idea, the same purpose.