A bit of an update on this, after having done some heavy braking things have certainly improved but I’m pretty sure they aren’t performing as well as the set I pulled out. I’m tempted to pull these and try the set without the bevels on them as they’re clearly different.
The sponginess has gone but I’m still having to stand on the pedal harder since the change which should have settled down by now.
I was impressed with the original Milner ones I fitted but these are a different type with the bevels on them.