I have the model 750S. I prefer combo edges myself, I like having the best of both worlds! Don't care too much for a black blade on a grey handle. Doesn't look right to me. But the BT2 coating will increase it's rust resistance as well as smoothness of operation, I won't deny that!
I also have the Large Sebenza's as well. Just about the only thing the Sebenza has over the Pinnacle is the BG-42 steel Reeve uses for the blade. Other than that, I like the Benchmade Pinnacle more so for work because:
The recurve blade, the combo edge, the titanium handle is a little wider and looks nicer as well because there is no unsitely hole in the handle and Benchmade utilizes black Torx screws for the pivot and assembly which adds to it's looks. I like the Integral / Mono Lock better, too, it is the same thickness through out, not drilled out at the flex point like the Sebenza is.
Last but not least, the Benchmade Pinnacle is 1/3 rd the price.
I don't regret buying my large Sebenza's because I also collect knives for fun as well as to use. I don't plan on ever using the Sebenza's at all, can't justify a price of over 300 bucks to actually use them when you can get the Pinnacle's at a much more reasonable price!
Both are fine top shelf knives, but for the price, the Benchmade Pinnacle is the way to go. Remember, this is just IMO on what my likes and preferences are!