In terms of pattern storage the Bass Bot excels in comparison to the TB-303, with 224 user patterns compared to the original 64.
Patterns can be entered step-by-step or randomly generated with InstaDJ software.
All patterns and MIDI beat clock can be sent out via MIDI , including accent and slides, or tied notes.
Also, using MIDI out, user patterns can be backed up.
External sequencers can either send MIDI beat clock to the unit or simply play the unit as a standalone module with MIDI notes.
Again, these features make the TT-303 seem like a better investment that the original TB-303, which only had proprietary DIN-sync.