the tone disparities I could be experiencing versus the real things (if noticeable) are completely irrelevant in comparison to what/how I actually play when the engineer press "record", how prepared, focused and solid I am at the session and just having the "studio attitude" in general. Much more important for my re-employment to spend my days working on my guitar parts and come in and record them smoothly and quickly with a killer tone (to me) than wasting these hours trying to chase the end of the tone rainbow by investing in more redundant pieces of gear or even debating about it.
And there you have it...