Played both series in the past, loved both. I'm anticipating Star Fox more since it's been very long since its last good installment. On the other hand I got tired of R&C after the 3rd game, since the series was getting too repetive. Yet this new R&C title looks very promising.
In the end I'm looking forward to try both of them equally but for different reasons.
And I don't see whats the point in comparing a platform with a 3D shoot em' up.