Samsung Watch and Gear 3 watch faces

Are these watch faces interchangeable? If I see a s3 face I like can I download for my Samsung Watch?

You should be able to sync any face found on Facer to your Samsung Galaxy Watch. I think you need to have the facer companion downloaded to your watch first though. You should be able to find that by searching facer in the Samsung app store. Then you should be all set, I think.