I think revisiting this video makes for good discussion. We all chase gear to get closer to "that tone". I am guilty of this as well. But I do believe, much of it can be attained with proper playing technique to emulate his sound. Whether it be chord voicings or pick attack, I think this video demonstrates technique gets us 85-90% of the way there. The rest is the gear.
I think from watching this video, its safe to say, Bobby can sound like Bobby on just about any equipment thrown at him.