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Well, it's a tough call 'cause they can get pretty close...And if that's close enough (which I imagine it is for most folks) for you than I'd say skip it...However, as someone who flips modules constantly both my Salvado Deluxe and Mamba are staying put and have since the day I got 'em...The Salvado Deluxe is so much more versatile but just can't (recto voicing or not) get all the way there on Mamba's insane character found in its low end, low mids, and tons of usable gain...I have found if I use different tubes in each I get more varied results...
