ahoy hoy,
hope my use of the brilliant Hope M4s does not offend anyone.
anyho, quick question can i use the pads meant for mono M4s to replace the ones that are close to worn out in my non mono M4s?

ta

I don't think so ?
IIRC the Mono M4 pads are the same as the old 4 pot XT brakes (You are right Kato one of the best)
I thought the old M4 brakes had 4 pads per caliper ??

They do indeed have 4 per calliper.
so maybe its the DH4 or Enduro 4 pads then?

In case anyone else wonders,
according to customer support at Chain reaction cycles, the DH4 pads are the same as the M4 pads.