Abus mini locks question
So I was looking at the abus mini 40 and the abus granit futura 64 mini. The 40 has a security rating of 10 or 11, and the 64 has an 11. This seems like it might be decieving, however, because when you look at the rating of the 64 it is out of a 20 possible rating, and the 40 is out of only 15, so even if the mini 40 only has a rating of 10, it would make it much stronger considering the total possible security. Can someone confirm/deny this? Does this make sense? I just don't know why they would have different possible potential security ratings- it leaves no basis for comparison, unless they just want to decieve people into thinking their expensive lightweight lock is more secure than it really is.