The Invellop leatherette folio case has magnets that hold the back cover in place in book mode. I don't know which case snaps shut.
The Speck fit folio is the exact same case as the devicewear only it does not have the sleep/wake feature. And its more expensive.
Speck really F-d up on that as I like the clasp on the fit folio and would have kept it if not for the missing magnets.