The gardiners are the only one that I have found that are actually 30 foot extended!! All of the others tend to be slightly less (a couple of feet) so weight comparisons might not be accurate. I actually hate lateral clamps as, to me, they are a step back. They catch more easily on conservatories or extensions and open up! Also I never had to tighten up the clamps when they were the "flip over" type but with these it seems a constant feature and in the end I give up but of course that causes problems or I over tighten and this leads to pole wear. (and before you ask, i have used Gardiners with the "spring device" waste of time, just a gimmick.