Brand recognition is worth £5 more
I've heard of Lacie and I've used their products; they're a well-respected brand. I can buy their products from one of several UK-based distributors. Conversely I've never heard of Eagletec, nor have I heard of "Hong Kong-based gadget purveyor Brando". If I was in the market for a tiny 4GB USB drive, I'd choose the Lacie in a flash (pun intended). The reputation of a well-known brand is worth an extra £5 to me.