AMD GPU manufacturers

[gmoney$]

Has anyone tried different cards manufacturers? I'm wondering if they are all about the same. I've got two rigs, one with Sapphire R9 290 cards and the other with ASUS R9 290 cards.  The Sapphire cards are averaging about 890kh/s and the ASUS are averaging 875kh/s.   There are many other brands: HIS, PowerColor, MSI, XFX, Gigabyte, Diamond.  I'm thinking of going with HIS cards in my next rig, but I'm not familiar with that brand.