You know, I’ve had a bunch of tube amps and I guess also solid state amps, all for guitar mind you, and I’m of the belief that emulations sound good on their own but I don’t think it’s going to properly represent every amp that bears that name.
I’ve played through different single versions of the same amps multiple times and, for example, I had a mkIII mesa boogie for a while which sounded different to at least 2 other mesa mkIII that I tried, even with the same type of tubes. The difference was more subtle on one than the other.
I’ve heard a wide range in the marshall tone from various similarly called models like the jcm900, and fender amps are all over the place. What I have noticed is that the amplifier families do share that common sound, so like the “brown tone” or whatever you call some fenders, they do all have a character which is alike but the individual amps are differently responsive.
Tubes also break up and distort differently than an algorithm, there’s something which I think is called high order harmonics which represents the way tubes will produce a more musical overdrive sound based on the way the harmonics actually form in the signal path.
Now I know that this is talking about distortion which may not be applicable to your situation, but it’s generally how I think of analog ciruitry - that digital doesn’t necessarily behave the way analog does, not because they haven’t taken it into consideration, but because not every analog signal behaves the same way every time, even of the same model and type.
Here’s something which sort off backs up what I’m talking about in regard to high order harmonics / distortion / clipping, and basically relates to analog vs digital, and emulation is obviously digital:
"The key difference between hard and soft clipping is the type of harmonic distortion or overtones they produce. Soft clipping yields mostly even harmonics, while hard clipping tends to produce odd harmonic overtones.
It’s also worth noting that clipping in the digital domain creates an entirely different, and generally undesirable sound. Unlike analog systems, digital systems will not let a signal exceed the threshold. Instead, the signal above the threshold is digitally removed from the waveform, which typically results in harsh-sounding, extremely loud harmonic artifacts."
So, in my opinion (which is not an expert opinion but an opinion none the less), there is the potential that interacting with an amp you’ve previously modeled might be different as you dial it in and get farther from the model of the model, or to say the specific model which they focused on emulating.
I wouldn’t stake a high cost transaction on assumptions though, I would probably look for somewhere that might let you play around on what you want to try, if it’s at all possible, even if you have to drive a couple hours to do it. I know this isn’t really helpful in the sense of giving you a direction to take with your original query, but i do feel like there’s some potential for variation in the tone and output, as you interact and change the eq and gain and levels etc. which the emulation may not be 100% representative of.
Tubes even start to sound different the hotter they get. Some people would throw a towel over the back of a tube amp to really heat it up when they were going to record a guitar solo, and I don’t know that emulation can accurately tackle that behavior.
I’m really not sure that you’ll love the real thing if you didn’t like the emulation though. I think it’s maybe a bit like one of those old generic cologne/perfume pyramid schemes where they were like “it smells just like CK one” and ck one is pretty gross to begin with, but it was very popular and very expensive, and I think that some of those emulations are pretty close to the real fragrance that sells for you know, 3 or 4 times as much as the knock off stuff, but whether it smells exactly like it who knows, it’s really up to the person wearing it.
I’m not sure that you would like the real fragrance that much more than the emulation, but if you liked the emulation, I think you’d definitely be more apt to like the real thing. If you liked the real thing, however, you may not like the emulation, and I think that this relates to amps but just a different sensation, your ears instead of your nose.
That’s all I’ve got to say, good luck!