I had the FM3 and still have the Standard.
I’ve never been able to create a modeler into FRFR tone that I liked in the room. Could be user error but I’ve tried for hours & hours.
My main rig is Axe into tube power amp and real 4x12. The Axe is virtually noise free, all analog preamps introduce a shit ton of noise in comparison, which is something I never hear anyone talk about but is a big deal for me. It’s night & day difference if you’re A/B’ing Axe VS analog pres. I’m not talking about what you use a noise gate for, if you A/B them you’ll definitely hear it, there’s a constant wall of noise behind all analog high gain tones.
The FM3 as a preamp is pretty close to a real analog/tube pre in terms of dynamics & feel but it’s not quite there. The Standard is not very close to a real analog/tube and has its own flavor, no matter which amp model you’re using it’s always there, but I’m way into that flavor. Idgaf about copying an existing amp, I want to program the amp I need that doesn’t exist.
The “Tightness trick”, in which you attach a high pass filter to an envelope controller, is a game changer for tight down tuned high gain. I’ve never heard an analog pre with actual tight fast responding bass like this.
Channel changes on the Standard is instant and seamless. It’s so good you can play some fast ass 16th note alternate picking and switch between clean/high gain with nearly perfect timing. I’ve never had analog gear come close to that, it’s always latency, or pops, or the high gain has to swell into existence.
So with the Axe FX’s high pass filtering, noiseless amps and easily tweakable parametric EQ’s, my in the room live tone cuts significantly better than any head or analog pre I’ve ever had (and I’ve had tons of different preamps). I still play analog/tube rigs daily but my Axe into tube power amp rig hasn't been dethroned for 12 years.