If you look at the current factory offerings for the .204 they aren't that impressive.

The majority of the.22-250 loads have more retained energy downrange, and flatter trajectory.

The .204 is trying to reinvent the wheel somewhat and isn't really an improvement over the 220 Swift or the 22-250. There may be a really, realy hot load out there somewhere that puts it up with the mainstay varmint cartridges but from what I've seen either of those two is a better choice overall than the .204.