Hi and welcome to the board

I personally, would probably take them back and get a girlier one. Both of those are fairly expensive bedding sets and you can pick one you REALLY love that has lots of matching items (lamp, mobile, rug, etc) and use the leftover money from the one bedding set to buy the matching items. I've never personally heard of anyone switching out different beddings. I guess that'd be great for those of us ladies who get tired of things easily

I'm actually one of them - but I like to go all out and have everything matching

Like you said, if you did want to keep both bedding sets, you would have to paint the room fairly neutral colors to go with both sets. I'm just wondering if you would be super happy with it in the end, KWIM?
It's definitely a personal decision. I am having a little boy, but if he had of been a girl.. oh let me tell ya, her room would have been PINK-a-licious

Also, the people who bought them for you as a gift would probably WANT you to return them for something you loved. Like I said, those are not cheap sets and you should have a pattern you really love. Good luck deciding what you do! KUP!