Just did some drawers today with em ;D
I still highly recommend R2 Zip 1-3/4" screws for Assembly though! Not sure about those wurth screws, but I know I don't want screws that go through a nickel going within 1-1/2" of a frameless cabinet face and risk splitting it.
I've used 1-3/4" #6 zip on MDF, Meleamine, Plywood, etc. Zero issues - ever.?
Do the assy screws come in #6?
EDIT:
The oversized hole (5/8) is for adjustment (obviously). But it is used typically afterwards. Make sure the screw is center when you drive it in. It comes in handy with a hole that size because sometimes a heavier drawer will sag when fully closed. Especially with newer kitchens that are mainly BIG, WIDE, DEEP drawers! People are putting heavy food processors in them, etc. I always have to go back and adjust. Lately, I have been asking the client first what they plan on using where. Then just subtract/add couple mm from my drawer face jig to account for the weight.
Michael Glaser