I think guitar is easier to emulate than sax, but either is far easier if you don't have to change chords and have left hand free for the bends, mods, strips, beams, etc.
I don't particularly like the SA stuff, preferring to do more myself, but that's probably because I haven't taken the time to learn to play them properly--old dog, new trick syndrome.
Toughest to do while playing chords is pedal steel. Everything seems to occur as the chord changes.
Being a trumpet player originally, I know what it's supposed to sound like, and what it can do, including range and limits.