Locks that work

OK, thanks. Yeah, according to bikeradar on the Fahg Mini...

Unlike the excellent Abus, in test two this one only required the one cut, but the material used is very hard.
Also according to bikeradar, it took "close to three minutes to sever" the Fahg Mini, but it took "a whole 4min 43sec" to break through both sides of the Abus Granit X-Plus 54. So isn't the Abus more secure and the better choice? It is cheaper, lighter, comes with a bracket too. Is there something I am missing?

I was seriously looking into the Squire Urban Paramount (13mm shackle, excellent 6 pin tumbler). According to bikeradar, it took a "portable powered cutter" (implying a battery powered angle grinder) to break it "in a little under 20 seconds". Can the difference be really that big between two D locks that are both 13mm? I assume the Knog Strongman can also be cut through in a few seconds too. Can anyone explain that? Is Abus using some special steel alloy that is very hard or something?