This is not necessarily a final answer, but so far I like it. It seems to have everything I need and some stuff I don't need....yet. I think the Vamp is nice, but it wasn't what I needed and not as useable live. It is also $260 cheaper. W are not exactly comparing apples to apples either. My old setup is this Boss TU-2=Boss=CEB3=Boss GEB=Sansamp Bass DI. That is what I need to duplicate, but I also wanted to experiment with new effects and more amp emulation options. I believe this is what I found! I have never played through a SVT amp, but I would dial in the settings on my sansamp and i liked that sound, so I wanted to duplicate it. I think I found my sound after playing with the preamp section for a while getting the right eq. settings and gain. I got the chorus sound I was looking for. I will be able to get the eq sounds at the stomp of a button that I wanted. I should be able to mess with some different amps. The octave tracks pretty well. It tracks better than the Beringer bass vamp. It is a little confusing at first, and I am not sure I am the master programmer yet, but it is way easier to set up than the vamp. There are several parameters that can be set on each effect. That is awesome, because they are often set rom the factory at unlikeable sounds. I can't wait to make a patch with the octave and the harmonizer for an Akai Unibass type sound. I bought the Unibass and sent it back, because i couldn't find a usable tone out of it. With all the options on the GT-6B I hope to find it. It has a DI out and a headphone out. This will be nice for playing at my church. I don't want to cart my amp around all of the time. I am trying to find a cheap wireless headset so I can use it as a monitor. I hate not being able to hear myself through the PA. I think this is what I am looking for. I plan to test it and put it through it's paces before I hang on to it for good! I plan to make a good frettless patch. I want a vibrato patch. I am having trouble finding a nice overdrive patch, but I wouldn't use it much anyway, but it would be nice for when you need some added dirt! There is much more that I will look into, but that is it for now!
I tell you King David, I have the v-amp pro and I am not totally convinced I like it. It does have nice amp models and the effects are OK but I feel that they are just OK. It is difficult to mess with the sounds unless you midi it up to your computer. This has made all the difference. I gig a couple of nights a week and having something rack mounted seemed like a good idea. I used to use a Zoom BFX708 and I think I got a better sound with that. I will have to read up on the GT. Good luck!
Out of the box the V-amp seems to have better amp simulators. I think the v-amp is top notch for that. It has A LOT more of them too. Having only an up and a down on the pedal for switching patches is a bit anoying too on the v-amp. On the GT-6B it took me a while to find an SVT sound that I liked. I had to play with the eq. quite a bit. I still do not have an amount of overdrive in it that I like. I have heard that multi-effects units are a compromise. I feel i have that. I believe the effects are very good, the amp simulators are pretty good, but not the best I have heard. The foot switching is wonderful!
I have the rack mount version of the v-amp. No foot switch. I think I might buy the midi foot controller for it. I did check out the GT-6B online it looks pretty intense. I thought about the GT-6B before I bought the v-amp but was having trouble convincing my wife that I needed it. Buy the time I add a pedal board to it, I may be spending about as much. My band is going into the studio soon, maybe the V-Amp might prove itself there. I just know I wasn't going to spend $599.99 on a Line6 bass pod and $224.99 on the foot controller.