The actual units have very similar performance, solidly mediocre, there's really nothing special about either. While the VP450P does rank higher, that's more to do with reliability than anything else, the sheer volume of VS on the market meaning it has a larger amount of returns by comparison, so a greater chance of getting a dud. That said, the VS does have better looking cables, the VP only sleeves the mains, and as said, it's 2yrs vrs 3yrs, so I'd be inclined to go with the VS.