I think that Ripple is a powerful idea that has been badly mismanaged, and yes, it competes with MSC. Their focus on Peter owes Paul owes Sam owes Jake debt chains causes their true killer features to get lost in the noise. Nobody cares about collapsing debt chains, but distributed exchange is incredibly important. Perhaps they have fixed this marketing snafu (I haven't checked lately).

I also disagree with their XRP distribution model, and I am doubtful about the case for long-term appreciation of that currency. (Trivia: the MasterCoin giveaway thread was funded with MSC purchased with BTC I got for selling XRP I received from an early Ripple giveaway)

Finally, I think their system is way too complex, not sufficiently decentralized, not sufficiently open source (this may have changed since last I looked), and not flexible enough for other cool things people want to do with distributed currencies.

Other than that, I love Ripple.