I actually did an A/B comparison with the dunlop wahs (actually an A/B/C/D/E/F/G comparison) I never liked the vox wahs or cylde etc etc so i went out and bought ALL of the wahs my local store had and returned ALL except one!! standard/classic/slash/jimi hendrix/zakk wylde/EVH/buddy guy/dimebag (i know im missing a few but that will be updated shortly) heres my review.. (please excuse my lack of "proper wah pedal terminology", i didn't get a bachelors in this field) Standard: we all know what this sounds like. a regular wah, nothing special,, i don't really have to write anything about this wah Classic: we know that this has the italian phasel, which sweetens up the sweep,, makes it creamy and much more character.. only tonal differences between this and the standard,, the sweep is pretty much the same i think.. narrow? Jimi Hendrix: now ive had the older model (all black) and the reissue (chrome) and i think theyre identical. what makes this wah unique is its rather long sweep and deep throaty wah. its very easy to break up this wah because of its higher mid end punch. its not an italian phasel so obv not as smooth.. but ive used this wah for the longest time and i love the long sweep of it. its a gradual wah with low end ive always liked it. compared to the italian phasel,, vocally it sounds more like a "WAH" whereas the phasel sounds more like a "WAY" Zakk Wylde: This wah is based on the jimi hendrix as Zakk used the jimi before he had this one made. it has the same long sweep and throaty sweet spot but its more pronounced in its lower end. the majority of the sweep is in the low end and mid range.. as soon as u pass the mid range it goes straight up quick,, thats why i didn't really like it, its such a dramatic axis.. and the highs are very high as it also has a phasel... Slash: this wah is identical to the classic. the only thing that separates this from the classic is the added distortion/boost circuitry. the fact that its run on 18v instead of 9v is a bonus because when you're not in "slash boost mode" this gives the wah more headroom before breakup, cleaner than a classic.. the added distortion takes away some bottom end but IMO gives you some more than decent slash tones if you play around with it. obviously used best for lead work, not your everyday rhythm wah.. Dimebag: pretty much the Q, with an added output jack on the other side for convenience. (i didn't have this wah for long so i cant make a thorough say on it,, however, the reason why i didn't have it for long is because i hated it so much.. it has all adjustable variables to suit your specific wah needs regarding sweep, volume, boost, etc etc,, also has a phasel.) IMO, the fact that you had all these adjustable parameters made this wah very artificial and digital for me. didn't like it one bit. Buddy guy: again, didn't play with this sucker long enough for it to send some love back,, however i can compare this to the dimebag wah. it has a phasel i believe (could be wrong someone plz confirm?) but it also has a similar feature that can switch the parameter of the sweep (just like the dimebag) however you cant adjust it, only switch back n forth between "regular" and "buddy" mode.. cool wah.. EVH: this wah has the BIGGEST sweep out of all of them, definitely stretches out your ankle! lol cool paintjob (overkill for some) and a very uniquie EVH pot which makes this wah HOT HOT HOT, almost adding a little bit of distortion to your signal,, its all about the higher midrange and high end that really screams and makes your guitar come to life. its definitely too much when paired with a high gain amp as feedback and crazy high end noise will destroy your tone. this is an angry pitpull on a thin leash!! the wah that i have decided to keep, is the slash wah,, i am going to go out and buy the EVH just for collection and to record with in the studio. for live,, i use the customshop rack wah what do you guys think,, like or dislike, agree or disagree? I hope this info helps, and hope that you think that this info is accurate too!!