They might not “arch,” but they appear to “go.” They work well with the bed. And once the bed is dressed, the walls painted, draperies hung…in other words, once you get things set up as you intend to…I think they will look fine. Matched “sets” of furniture are less attractive than furniture that looks “collected.” These look fine. A nice side chair in a third wood, would make it look intentionally “collected.” Good luck! Your room has lots of potential!

“Match” not “arch!” Damn autocorrect!

In the picture they do look like a good match in color and in style. So it's a matter of whether you think the difference is going to drive you crazy over time, or do you think you can live with it? I never even attempt to get two different manufacturer's products to match. For instance, I would have bought something white or off white. But that doesn't mean I think you should return what you have, it's just an observation you can think about when you're buying things in the future.

Complete the rest of the decor, and it will be fine. No one will ever notice the slight difference once the room is finished. Go with it!

I like them. whybwould you think oak would be better?

Matching woods are less and less popular, as mixing styles can make a room more interesting. I think yours work visually and once you accessorize room, they will be fine. Actually in the site you provided, the furniture is not matching.