I think both intakes are about the same price. (maybe $100 difference) If that top one is a bolt on to a 2x4 intake than there's no question on which one to buy.
My vote would be the McQuillian intake. Even if the McQuillian intake was $1750 or $1850, I would still pick the McQuillian intake simply because it looks so much better.
I don't own one but I would assume it preforms better too. The intake listed on eBay looks like a after thought. It really does look like a blower intake plate bolted to a two 4 intake manifold.
Maybe its the way the picture was taken but for $1550 it better look good and perform! Just my 2 cents.