I have Jap callipers and EBC HH 100 pads on my G/S, GS , and I had them on my VFR , and they are by far the best pad I have ever used on these bikes.
But they didn't suit the Brembo disk on my F650GS.
So I think it is unwise to generalise on pads by Brand.
If some type of pads don't work with some disks it is good to know but the statement that every type of EBC pad is no use with every disk is just stuff and nonsense - every test of pads I have read has EBC pads right up at the top.