Shaun,
(sorry, I've tried to reply a couple of times and keep getting kicked out. I'll try to keep it clean, Honest!!)
I think clean may not be the best choice of words, it just has a more sharp high-end to it. Kind of an eq smile inherent in the neck-through. When you turn up the treble on the Excel, it just gets more aggressive sounding.
Alas, words, like pictures, do not do justice to these instruments.
Ken (TEO)