Upgrading my current bike from Ultegra 6800 to Di2 and am debating between the 6870 and 9070. I know shift performance is pretty much equal the only real gain is weight savings with the DA groupset. My LBS has priced me the entire kit and Im looking at ~$550 more to go with the 9070 over the 6870. Do you guys think that it would be worth it to go DA in this case? Note: The build does not include the brake calipers or the crank so the different parts for the $550 would be the Front Der., Rear Der., Cassette, and Chain.
Build kits:
6870:
Internal battery
Internal wiring
DA 1-button tt shifters
DA brake lever/shifters
Ultegra FD/RD/Chain/Cassette
(no crank/brakes)
9070:
Internal battery
Internal wiring
DA 1-button tt shifters
DA brake lever/shifters
DA FD/RD/Chain/Cassette
(no crank/brakes)
Build kits:
6870:
Internal battery
Internal wiring
DA 1-button tt shifters
DA brake lever/shifters
Ultegra FD/RD/Chain/Cassette
(no crank/brakes)
9070:
Internal battery
Internal wiring
DA 1-button tt shifters
DA brake lever/shifters
DA FD/RD/Chain/Cassette
(no crank/brakes)