My Nike Tiger Woods 60º is 10º bounce and it sticks to it even on the hardest of dry fairways. You'd have to BE Tiger Woods to tell the difference in bounce on wedges. I had a Vokey (pre-spin milled) before this wedge and it was 8º. It's all about the grooves on a wedge.
In my humble opinion, spin milled oil can vokey is best wedge on the market. I think you can get it in a 4º bounce too.
HOWEVER, I do understand the importance of matching clubs. Especially wedges, and the Vokey does feel heavier than the Mizuno as well.
So go with 4º. MPR is nice.