Smugmug vs Mozy

[mommy2twins]

So, I am looking for on-line back up of my photos and LO's. I am looking at Smugmug and Mozy. To me, it looks like Smugmug is less expensive?? Is it just as good? I back up my kits to EHD and then every so often to DVD....which is fine for me. I am concerned about my photos and LO's already done.

Can you enlighten me on the difference between Smugmug and Mozy?

Thanks!
Dawn