I need to replace the solar blanket on my 15x24 AG. I always see mailings that list different blankets and pricing for AG & IG of the same grade and thickness. My question is -If for example both are 12 mil thick and the same grade - what is the difference between the AG & IG solar blanket. Is it only that IG 16x24 has squared conners, where the AG 16x24 is oval?

BJ's has what seems to be a decent blanket (and price), but it's an IG and larger than I need. I am not opposed to trimming if this is the case.
Thanks, Harry D.

PS. For those of you who are thinking of one and have doubts - I have used a SBlanket for 18 yrs and think they work great (in east coast NJ area).