If I want to mod my infinity, I want to use a backplate. Which is better?(e6600)

Coolermaster:
http://ecd.coolermaster.com/english/...ylist_ebp_n775

Thermalright(this is a backplate right?)
http://www.azerty.nl/producten/produ...5-rm-clip.html

Which is better? the CM one is only 1 euro, the TR is 6 euro. Which is stronger/better for this mod(s775)?