Here's a little write-up from Bogner's website. Doesn't directly answer your question, but might be of some help:
V30 at 8 and 16 ohm (best all around speaker with 60W power handling, cuts through just where the guitar should sit in a mix)
G12H30 at 8 and 16 ohm (30W only, less upper mids then the V30, a bit more pleasant, nice in combination with the V30)
G25 Greenback at 16 ohm (25W only, classic sweet Greenback tone, nice in combination with the V30 and G12H30)
Classic Lead 80 at 16 ohm (80W, big bass response with smooth dark upper mids, good in combination with the V30 but to dark by itself)
G12T75 at 16 ohm (75W, tighter bass response, we use this one in combination with the V30 in the Ubercab)