What's the difference with the pagid discs on work car parts ? All same make but different prices is it the quality of the steel ?

What's the difference with the pagid discs on work car parts ? All same make but different prices is it the quality of the steel ?

I'd guess the size of the discs. If I remember right ecp gives all variations of brakes required for the fabia even if you put your reg in.

I have always respected Pagid brake parts.

There are cheaper discs available  but in the past I have had issues with disc warping due to unavoidable heavy braking just after a disc change - I have read that you really need to "run in" discs to avoid warping and also that cheaper steel can exacerbate the problem. Others have said they are all the same but at different prices....