Looksmart UK and MSN UK

Different sites

[mog]

Hi, I know that Looksmart feeds MSN but when I do searches in Looksmart UK and I compare the MSN UK directory results to Looksmart, the sites that come up are totally different. I realise that the results will be different but what I don't understand is why only 50% of the sites match up, where are the other sites in MSN UK coming from.

[makemetop]

LookSmart UK is UK directory sites then Inktomi (sort of filtered) backup. MSN UK is LS UK directory sites - then LS US directory sites - then Inktomi.

[mog]

I realise that the US looksmart results are displayed after the UK but it is within the UK results that I have noticed the difference.
Any ideas where the other sites are coming from?