I have just picked up a 920, there are no 910 mediums left period!
Not sure about the competitive weight but…
the 920 is 500g heavier than than the 910. I could not work out where until you read that a 920 comes with 500g pedals the 910 does not come with pedals!!!
My LBS “suggested” that the difference between 910 and 920 wheels are a sticker! Not sure how true this is but, strager things have happened.
As there was no 910’s the LBS have swapped the SLX stuff for XT for £70. the only difference now is the Evo forks v’s the Factory forks, which has saved me £500, truth be known I dont think that I could tell the difference and the CTD Evos are fine (I think so anyway).
Finishing kit, stem = right length, bar = right width, post keeps saddle at right height – CHECK!
Love this new bike, the matt finish is great too.