But it comes down to what you're looking to continuously go at as well. VTC4's have the AMPs to super safe vape 150W in a series... Not to mention its a regulated box so you're good. The Snow Wolf isn't a true 200W since 150 above it just pulses. Personally for my boxes I go VTC5 because they have a good continuous and a safe maximum discharge, with the added bonus they have a higher mAH so the more battery life the better.
The VTC5 is a great battery but it is a 20A rated one. Wasn't sure if you were using them as a direct replacement for the VTC4's or not. They get much hotter above 20A than the VTC4's and will age much faster.