Can someone respond to this:

http://zerocash-project.org/

"Zerocash improves on an earlier protocol, Zerocoin, developed by some of the same authors, both in functionality (Zerocoin only hides a payment's origin, but not its destination or amount) and in efficiency (Zerocash transactions are less than 1KB and take less than 6ms to verify)."

What will the size of our Zerocoin transactions be?

If the transactions are large and blockchain bloat is an issue, is there a way we can develop a "lite" wallet such as used by Shadowcoin (who is also working on zk-snarks btw). Spending Zerocoins from mobile devices (without a ton of storage space) would be a great feature!

Besides RSA UFO generation (to ensure Zerocoin can be minted in a trust free manner) does Zerocoin have any other advantages over Zerocash?