7700 suffers in comparison to 9sp record IMO.

First subjetive:

1. It's good looking for Shimano - but that's a low bar. It still isn't close to the beauty of campy.
2. The levers/hoods aren't as comfortable as campy.
3. I prefer Campys QR on the lever.
4. I prefer Campys shifting locations...the STI blade movement never appealed to me.

Objective:

1. The front trim isn't nearly as good.
2. The hoods feel cheap and are much thinner
3. Ergo lasts longer.
4. Ergo was rebuildable, STI wasn't
5. STI gums up more easily and more often.
6. Octalink has compatibility issues.
7. Name plates get lost and scuff.

STI's advantage -

1. Cheaper
2. More precise indexing.