Can someone tell me which Mr muscle is for kitchen marble?

I wouldn’t use either tbh. Just some mild dish soap and water.

See if you can find a product called Elbow Grease in the UK... I guess it should be available in Europe... It's usually cheaper than Mr muscle and it works better

Buy a proper cleaner designed for marble countertops. Lowe's or Home Depot or a store similar will have what you need.

...is your knob done yet?

Neither.

i vote the one on the left!

Contact a home cabinet and countertop installer and ask what they recommend, or even a home improvement specialty store that's not home depot or lowes.