All of our amps basically sound the same, The Blu series has 1 channel, and The Bud series has 2 channels. Each is available in either a 6″ or 10″ version, so your decision should be based on how many channels you want, and whether or not the 6 is big enough or if you need the 10. The Bud series has an input gain on each channel and a wider spectrum of EQ center frequencies, this is to accommodate microphones because we assume with 2 channels, one of them may be used for a mic.