CAM870 vs DM870 shell ejecting

[DuckyTehGreat]

I've been looking into getting a shell ejecting shotgun for aaaages.
Does anyone have experience with or own an APS CAM870 either MkII or MkIII and can advise on the performance differences and/or the Dominator DM870's?

Can't decide between them based on the information I've seen and can find no direct comparisons of them anywhere on the web.