I just played the Slash next to my Heritage H-150 with Duncan Pearly Gates. The Slash has one of the thickest necks I've ever played. It's more of a thick U shaped neck. The H-150 is a rounded C profile. Both are comfortable, about the same weight (8.6 vs 8.8 pounds), and sound amazing. But I have to give the H-150 the edge. It just feels like a nicer guitar. Not that the Slash feels bad. It doesn't at all. But somehow the 150 just feels better. Maybe it's all in my head. The Slash has a heavier sound because of the Marshallheads. The Pearly Gates are clearer sounding. Very nice, but very different pickups. The body on the Slash is also slightly thicker than the H-150 by about 1/16 of an inch. The Tribute is super lightweight at 7.2 pounds with a rounded C neck profile. Again, it feels more like a rounded U, but it's not as thick as the Slash and feels different from the H-150.
At this point, with 2 Heritage H-150's and 2 Gibson Les Pauls, I'm set for that type of guitar. I also have a PRS SE Tremonti single cut with P90s, a 78 MIJ Electra LP (with effects cartridges), and my Heritage H-137. In addition, I have Strats, Teles, jazz boxes, and semi hollows. I'm converting one of my cheap semis to a Rickish type. I have a set of Ric Hi-Gain pickups for it. I also have the old thin hollow body 330 style that I played in college that I call my "Fibson". It's a rebuilt MIJ 330 copy. I cut my teeth on guitar with that one. It has a set of SD Psyclone pickups (Filtertron style). I'm set for guitars and amps.