So many different ZZ Top tones, what era are you talking about?
The early Tres Hombres stuff is way different than the shag carpet guitar era, and now they tour with anything a sponsor will provide with $. I have seen them 3 times, the live show in 79 seemed to be more about the music and sound, after the 80's it seemed to be about MTV and impressing teenage girls. I saw them on TV last month and the tone seemed like a sack of sh!t. But man that Jesus Just Left Chicago tone is a classic, and Bad/Nationwide..... that is the swagger.