I'd go for the second one MJB - the first one says 'sold out'.
But seriously, they do look pretty much the same, although there's no price on the second, but at 2 kilos it sounds good. I agree with Titaniumdude that tents do tend to do what they say they'll do in most circumstances, so unless you intend high level, 4 season use you'll probably get away with either.
It's interesting how technology is going. My first trekking standard tent, and I wanted aluminium poles because I was going high, weighed in at 2.5 kilos and cost considerably more than these. I thought at the time I'd never be able to improve on that. Then the Hilleberg came along at 2.1 kilos so I bought one just for the weight loss although I think the main weight loss is because your wallet weighs considerably less after buying one. Now you can buy a 2 kilo tent with aluminium poles and get a fair bit of change from £100!
S.