BCC's difficulty will be adjusted quicker:
There are 2 issues with this adjustment-algorithm:
First, it only compared the most recent block with the one 6 blocks before that. So if there's no BCC block mined yet, then the difficulty won't be adjusted. This means that if only a small fraction of the miners switch to BCC, then it will take a long time to find this first block (1% of mining power -> 16 hours on average).
Isn't 1% a rather bold assumption?
We are lacking solid numbers here, of course, but one could take the BIP91 activation period as a hint on those. 100% - 85% = ?
And 16 hours are forgotten after a half day, at least. The difficulties might end on wednesday this week.