Only ones I've used that snap that easily are the out of date ones - so the first thing I checked in your picture was the date on the center - both seem to well in date. If that's the case, then sounds like a manufacturing issue with the disc.I don't have the failed discs as they have been sent to supplier as evidence for refund. In the hand the difference is quite apparent, one disc you can quite easily with one hand snap and break into pieces, the other requires two hands and a decent effort.