RAM 16 GB do iMac 21,5" model 2011

Zdravim,premyslim o upgrade pameti ze 4 GB na 16 GB a zatim jsem vybral 2 modely:

Kingston Value 8GB (2x4GB) DDR3 1333 kit pro Apple u CZC za 953 kc X 2 = 1906 kc


OWC 16.0GB (4x4.0GB Kit) PC3-10600 DDR3 1333MHz SO-DIMM 204 Pin CL9 SO-DIMM Memory Upgrade Kit for Mid 2010/2011 21.5" & 27" iMac Models. Lifetime Warranty. (1333DDR3S16S) Same Day $103.96
Matched Kit for: $94.00

Kterou mi doporucite,jestli Kingston nebo OWC? Parametry se mi zdaji podobne,u OWC je dodani cca 14 dnu a jeste se musi zaplatit DPH.