Well I started making notes on the different delay types since the manual is light on info. It turned out to be more than I'd expected! I didn't get as far as determining the left/right ratio for stereo repeats. Feel free to add or correct these.
Delay Types, Stereo Behavior, and Max Sync Rates
BBD = rhythmic symmetric ping pong, panned left and right regardless of where voice is in stereo field. Division: Max 1/2
Ping = stereo rhythmic ping pong, panned left and right regardless of where voice is in stereo field, with the first left repeat at a quicker time than the right. If the note is hard panned left or right only the repeats on that side will be heard. Division: Max 1/8
Stereo Delay = repeats always in stereo field based on Stereo setting, i.e. a left-panned note will have hard left panned repeats. Division: Max 1/4
Long Delay = mono regardless of where voice is in stereo field. Division: Max 1/2
BBD Ping Pong = rhythmic symmetric ping pong, panned hard left and right regardless of where voice is in stereo field. Division: Max 1/2
Karplus = mono tuned delay (mostly for physical modeling etc). Divisions not shown but knob does affect rate when rate is synced.
Stereo Spread = stereo symmetric ping pong, panned left and right regardless of where voice is in stereo field but with a slight delay in the left repeat. If the note is hard panned left or right only the repeats on that side will be heard. Division: Max 1/4
Parallel = stereo rhythmic ping pong, with the first right repeat a quicker time than the left. If the note is hard panned left or right only the repeats on that side will be heard. Division: Max 1/4
BBD Spread = 2 repeats at the same rate but the left one being slightly delayed. Left and right repeats are heard regardless of where voice is in stereo field. Division: Max 1/2