what do you think of these superking 1500 pocket mattresses

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Hi everyone. considering getting one of these 2 mattresses what do you think? is there any difference in them apart from the twenty pound price or would you recommend something else
http://www.ebay.co.uk/itm/250976059...X:IT&_trksid=p3984.m1423.l2649#ht_3213wt_1037
and
http://www.ebay.co.uk/itm/290650589...X:IT&_trksid=p3984.m1423.l2649#ht_2900wt_1037
Thanks in advance