I have both yellow and pink gold and personally I love the yellow gold. I didn't even consider getting yellow gold for my first bracelet I just got the pink gold. My pink gold is pretty rosy while my yellow gold is pretty yellow imo. My yellow one is a lot brighter and looks cleaner (but it is newer). Like the earlier posts say, if you prefer for the bracelet to pop, yellow is probably best (the yellow one is a lot more noticeable). My pink gold one matches my skin tone more so it kinda blends.
I'm not sure if it's just me but the pink gold one seems like the scratches are more evident, whereas the yellow not so much.