I have played the Big Muff Pi USA pedal and like it. It is big and I don't mind the size, it sounds great and has great sustain. I want to buy one of these. Since a lot of you guys have a lot more knowledge than me when it comes to these things, pedals and so forth, I am hoping to get some feedback from some of you as to which one would be the best, objectively speaking, pedal - aside from subjective, "it's a personal preference" thing. By this I mean, is there any difference in the sound of the two Muffs, with the Tone Wicker one in standard Big Muff Pi mode? And I know that there are a couple switches on the Tone Wicker one that expand its tonal capabilities. Are the Tone Wicker added features a great idea or are they just additional bells and whistles that don't actually improve the natural sound of the Big Muff Pi USA? Aside from personal preference perspectives, are there any of you that understand the different circuits and can evaluate the affects on the character of the sound produced by each pedal when compared to each other? Supposedly in standard Big Muff Pi USA mode both pedals sound very similar, but there is supposed to be a perceptible difference in sound. Since the Big Muff Pi USA sounds really great to me, I don't want to lose that special sound by trying to overdo it with the Tone Wicker, unless the basic sound is great and the added features are substantially improvements. I'm not interested in trying to find an old version or a Russian version. They have the ones discussed above at the store by where I live. In my opinion the Big Muff Pi USA is the best sounding fuzz pedal that I have tried, by far. Hopefully someone will have some insight into this question regarding the differences between the two. Before I go to the store today and AB the two pedals I would like to have some knowledgeable info going into it that might help me with my evaluation and give me some specific things to listen for. I know they use different power supplies, with the Tone Wicker one supposedly using the standard type power supply jack; but this isn't really a point of concern for me because I will buy whichever power supply is right for the unit I get. Feedback is appreciated and thanks in advance.