I compared the modded one directly with my un-modded one. I still haven't had time to get back to comparing them though. The modded version is clearer. It doesn't sound like alot of extra high end, it sounds like your bass but compressed, without the high end loss you get from the stock pedal. The whole sounds is more "real" and less "plasticy" for lack of a better term. There may be a touch more true low end as well but, I won't know until I try it with my full rig and big cab. I ran both pedals in line and switch back and forth between them into a shuttle 9.0 and my lds sealed 15/8. If I ran through a full range or pa cab, Im sure that the differences would be much more pronounced. My stock version is built into a rackmount and when my shedule slows down a bit, I may send it in to be modded as well. For less than $50 you can buy a used one then have it modded. You would have about $130 (including shipping) invested in what I consider to be the best bass compressor out there. Of course, my Origin Cali 76 hasn't arrive yet. That may change things. You can't lose with the pedal and mod.