Corrina/Object::Pad is an object system. Venus is a fully OO standard library. While it's true that Venus has its own object system that’s just incidental.

I do assume that once Corinna has seen mass adoption, there "may" be an effort mounted to use it to create a OO standard library. Who knows if and when that will happen?!

While Corinna is trying to achieve mass adoption people will still need and use what's available now. For this reason, I don't see Venus as being in competition with Corinna.

On the question (and potential future) of a Corinna-based standard library: (personally I feel) "A Venus-inspired Corinna-based standard library would be fine by me, so long as it's extendable (via inheritance and plugins), and makes core behaviors available to us as roles (traits) for use in our own downstream software."