Why not buy 1or2 and try them , ie small outlay. I purchased some cheap blades in UK and they would not fit my rotary cutters. Size was correct it was the hole in the centre which was too small. Luckily I had only purchased one pack of 5 but they did fit a friends cutter.
Good luck I know the feeling of those nicks. Is there a handy man near with a sharpener for knives who can sharpen or remove nicks. I collected a pack ie 10 and took them to my cousin who as he does wood turning understood my problem and removed my nicks for free. Normally wouldn't ask I was working mainly one handed which was causing the problem.