Have I the wrong disc pads?

[macafee2]

I have received new Mintex disc pads, the box is labelled Rover 75 and matches the reference number shown in the Mintex look up table MDB2011

https://www.brakebook.com/bb/mintex/...onSearch.xhtml

These disc pads have a chamfer on the leading and trailing edges.
The ones on the car dont. This means until the pad is worn to the chamfer I have less pad on the disc.
I dont recall when I fitted the existing pads years ago they had chamfers, they certainly dont now but that could be due to wear.
I am pretty sure what are on the car are mintex but i could be wrong

your thoughts and advice please

macafee2