I guess there is a connection in the sense that with reservoir sampling, each sample observed has an equal chance of remaining when you're done. However, if you have duplicates in your samples, traditional algorithms for reservoir sampling do not do anything special with duplicates. So you can end up with duplicates in your output with some probability.

I guess maybe it's more interesting to look at the other way. How is the set of samples you're left with at the end of CVM related to the set of samples you get with reservoir sampling?