love my Mesa V-twin, had it 20 years or so and its a very solid overdrive distortion pedal, really the only distortion pedal that I have found that I like, the V-Twin has Gain, Bass, Midrange, Treble, presence and master volume, the bottle rocket only has gain, bass, treble, and output, the V-Twin will also drive a set of headphones, or go straight to a mixer channel.
the V-twin is capable of four channels
Bypass is the amp that your using, I used a fender custom vibralux so I got a nice Fender Clean.
Clean channel is the amp running through the V-Twin, you get the tone controls from the pedal, so you can get a crunch with the mid cut and treble and bass boosted, also the volume can be boosted for a solo,
Blues channel is a really nice tone, its switched with the clean channel, and is the channel I typcially used TBH, really loved the tone
Solo is like my Mark IV solo channel, sustain forever, actually it sounded better than my Mark IV TBH.
Played the bottle rocket in the stores, really just bypass and the pedal, has Gain, Bass, treble and output, you can get close to the solo channel on the Mark IV, but you don't have the clean or blues channel, and it does not have the mid range, or presence that my mesa V-twin has.
here are the user manuals, see what you think
bottle rocket
http://www.mesaboogie.com/manuals/V-1.pdf
V-twin
http://www.mesaboogie.com/manuals/V-Twin%20pedal.pdf
personally if you can find a V-Twin I would get the pedal, its a great pedal,
