For very different guitars (SC vs HB) they would be very difficult to sound the same indeed - personally I would want them to sound very different to bring forward the significant difference between HB and SC for example (if it's a Les Paul and SG then yes, why bother).
Don't know about Joe Walsh, but afaik, lots of artists use amp switchers for drastically different sounds which also include different guitars (ie, strat into fender..., LP into marshall), or, choose multi-channel amps that can accommodate
both flavours on separate channels (would not be surprised Joe uses one
of these methods since he and Don Felder tended to play together using "opposing guitar tones". But to be clear, I'm only refering to very different categories of guitar (ie strat, tele, LP) - for my SG and Carvin HB guitars, I just boost the Carvin at inpit by a couple
of DB as you do and all is good.
Fair enough....the beauty of the Axe is that I can achieve the same db boost for the Tele with a GEQ or PEQ block and sculpt the sound a little at the same time. I'll give it a go at this week's rehearsal and may well be pleasantly surprised to discover things could be even better
For reference @York Audio's Jimmy Page Celebration Day preset which I paired with @2112's TVMix7 IR was the starting point for one of my most used tones and it sounds superb whatever guitar I'm using. Yes the sound is slightly different depending on the guitar - but to my ears it's in a good way and I actually like it most with the Tele:
https://forum.fractalaudio.com/thre...one-celebration-tour-2008.162950/post-1953013