Innoue can counter punch faster with his left as seen in this fight. He did a lot of left hook, though its blocked, it opens vulnerability of Donaire. When his feet wobbled, you could already see the outcome.
I didn't pay attention to the dates of this match, I didn't even thought their will be a rematch but so it happened and missed betting. But what I noticed is the crowd, Japanese are so behave.
In terms of speed Inoue will lose but his left Hook will clearly be a problem considering in this case he has the advantage because Donaire is not used to holding back left-handed boxers.
But on the other hand, when doing this, there will also be a bit of trouble for Inoue because if you look at Donaire's determination and fast movement and his accurate punches, this will obviously be a hassle for Inoue.