Hi, djmm,
as a general rule of thumb, gold (and platinum) have lower surface hardness than steel, hence will scratch more easily.
This can get a little complicated because gold can be work hardened, and there are "softer" grades of steel, but in general, it is safe to assume that gold will "scratch" more easily than the stainless used to make most watch cases.
I would be very careful with "wiping" gold cases, and even SS cases - even the softest microfiber in the world can have trapped "hard" debris - a grain of sand or pebble, for example, or a sliver of metal, whatever. This then acts as a graver or sandpaper when you rub the case with the cloth.
Are scratches more obvious on gold than on stainless?
Not usually; how "obvious" a scratch is usually is more dependent on the type of surface finish the scratch occurs on - high polished surfaces show scratches more than brushed, for example, especially if the scratch is in the same direction as the brushing.
Cheers,
TM
From my understanding, a solid 18K rose gold watch (or any other color of gold) will scratch easier than stainless steel watches right? I don't have experience with gold watches before, so I am wondering how soft the metal actually is. I mean, will it pick up hairline scuff if we are not careful and just wiping it with slightly less soft cloth (not microfibre cloth)?
And if they do scratch, are they more obvious than SS surface?
Reason I'm asking is my partner usually freaks out when her precious SS watch get scratched. I wonder if a rose gold will be even much worse and obvious to see.