For me and for many others as well, Vape V2 is more of a finished, cleaner product. Vape V2 is less laggy for me as I get around 400 fps injected with V2 and only 160-250 while on V3.
You may try both versions of Vape, the performance is different for every single machine, I highly recommend you to use V3 because of the new modules Arithmo has brought; but V2 is still a good option for you anyways.