"ASUS B85 Plus" has less features than "Asus H87 pro"
see here http://www.pugetsystems.com/labs/articles/Z87-H87-H81-Q87-Q85-B85-What-is-the-difference-473/
Basically if you don't intend to raid 2 hdd, and and have a limited budget you could choose the b85 chipset. But if you have the money, obviously the h87 pro is the better solution.