Appreciate this thread, need to replace my broken/destroyed 9070 Di2 levers after a crash. Finding them is very difficult. Sometimes show up on eBay..but new, pricey compared to 6870.
I was getting tired of waiting for my overseas order online for the 9070 new levers I purchased. No shipping ETA, and trying to save a few bucks instead of getting them someplace in stock.
My idea was to try the 6870 instead. Besides no computer button on the 6870, they look nearly identical now with the redesign. Just the weight/some materials difference.
Also, I think it looks like the actual clamp on the 9070 is titanium? Have to take a closer look, but it is def/titanium color and not steel compare to the 6870. Could take my old clamps off my 9070, put them on the 6870, maybe save some weight, 10gms or so. Besides the weight difference, maybe that hood material which is mentioned, adds to the 6870 total weight as well?
The $200 savings is attractive as well for the 6870. And they work fine with DuraAce derailleurs...so yeah. What to do?
Tired of waiting to ride again, so 6870s can be had within a few days online, compared to Di2 9070. Might just buy the 6870, do some weight comparisons on my scale of the hoods, clamps etc...for fun.