I can only comment on Ownhammer VS stock, but my live experience is the exact opposite of the OP. Ownhammers are fat, juicy, meaty and whatever adjective you prefer. REAL, with minimal tweaking. I like! This is coming from the perspective of someone who uses a real guitar cab onstage.. I'm talking about Ownhammer IRs direct to FOH.
When I first got my Axe I spent a crazy amount of time tweaking in pursuit of full FRFR joy. I liked the concept of ditching physical guitar cabs. I used QSC HPR12 on stock IRs, PEQ after cab. It sounded great but in the end my ears were too conditioned to want the sound of my cab, not the sound of a miked cab. Since I already had great guitar cabs I finally said "hell with it", bought a power amp to drive them and have been happy ever since.
FOH you will hear a miked cab regardless, the choice is whether to just mic the cab or use IRs. So I did lots of A/B testing - I set up all my presets to send pre-IR to my cab onstage and post-IR to feed FOH direct. I have to limit the number of IRs I use to keep things sane, and they have to sound ballpark similar to my real cab. I like the simplicity despite the limitation. For the most part I preferred IRs (using stock ones at the time), but it wasn't a slam dunk and I was tempted to say "hell with it" and just put a mic on the cone like always.
A lot of time passed, I read lots of RedWirez discussion but never tried them out of aversion to complexity. I'd finally settled on something simple, and I liked it. Then Ownhammer came along and I read a few rave reviews, plus I was about to do some recording so I bought the bundle. Wow, really consistently great without overwhelming options, so I worked my favorite ones into all my live presets. Listened through vocal wedges at band practice - wow again, it sounded great! At the next few gigs I stood near FOH mix position at soundcheck (wireless guitar) I'm pretty amazed.. this is a very familiar PA in a big dance hall. I can't possibly make it sound that good with a mic on my cab (which is up on stage as usual).
Next band practice I show up early and I'm A/B-ing between my cab and the Ownhammer IRs through vocal wedges.. damn.. yeah, it's good. I could actually live with that.
So now I'm considering ditching guitar cabs again, and the difference was Ownhammer.