I don't have a Baltic, rather, I had an Atlantic3 TRP, single ended with volume control. I would bet that the implementation is virtually the same.
It was quite possibly the most transparent analog VC I've ever used on a DAC. When compared to arguably one of the most transparent VC in an Ayre preamp (actually a variable gain control) I could perceive zero difference. The wonderful sound of the Lampi DAC with its tubed output stage came through equally well either way. So at that point it comes down to preferences, number of sources, how many remotes you want to use etc.
If your preamp is less than excellent you'll be better served by the Lampizator VC, in my experience and opinion.