Are the Black Ice heatercores worth the $?

[stevens]

I just got a heatercore from ebay that isnt what i bid on and am trying to get my money back, so i am thinking that i was going to buy the exact heatercore i want straight from the manufacturer, but it will cost $55, and for about $10 more i can get that new Black Ice heatercore. Which should i go with? How can the two be comparable when the car one is almost twice the size of the black ice heatercore?