The differences will hardly be noticeable when you're driving around town. When stopped, a VERY keen eye might be able to see a difference. From the first pic, it looks like these Chevy caps are a wee bit shorter, I haven't looked at the dimensions or anything, just eyballing it. The lip at the centers is alittle taller on the Mopar ones it seems. Best is a side by side comparison obviously...
If it fits, are secure on the wheel, and you like them, go for it!
Just make sure the center caps don't fall off revealing a Chevy emblem under it...