I'd say in general Warm = VINT. I haven't A/Bed them directly (actually I don't think I've even touched the IB since the 803 arrived!) but they are definitely in the same ballpark. I think the gain is more dynamic on the 803 than the IB so that you can get a wider variety of tones from the 803 WARM setting by varying your right hand technique.I'm also impatient to know how the "Warm" and "Qtube" voices compare to the "VINT" voice of the Quilter Interbass.
I suppose that the 803 Warm setting = Interbass VINT setting, and the Qtube is even grittier, but I'll check this tomorrow.
With the Interbass, if I select the "FR" setting I'm thinking "I prefer this one", and when I switch to "VINT", I'm like "No, I prefer that one". So I guess I will love and use the 3 voices of the 803.
Also, I had the feeling that the "Scoop" input was aimed for home practice in order to compensate for the lack of low end at bedroom volume (like the "loudness" control in old Hi-Fi amps), and not very usable at gig level, but I saw comments on YouTube saying it was more intended to emulate the SVT vibe (regarless of the volume), so I'll have to check that at next rehearsal…
Qtube is nice and gritty. It's very usable if, say, a whole song or whole set requires that. But I'm finding that warm is my sweet spot and when I need a bump in drive/distortion/fuzz for just a part of a song, I get that from a pedal.


