bbk / roe / who is tony? And what the price the bbk/roe are priced together.
I would in my personal opinion your dual blade on the viper is going to actually perform and give you a better throttle response than the single blade
if you study the air flow dynamics of both models the dual blade is much more efficient with air and fuel distribution, and it should give you more low end punch , while it may sacrifice some on the top end, where the single blade will or should be reversed.
for everyday driving a dual blade would in my opinion be best, a single blade on the viper engine, even fully built models , only seem to make hp on the very top end.
making big numbers is one thing, and what a single blade would do, but the dual blade should make hp all across the board, while maybe not the peak number like the single , but I would rather make hp across the entire range instead of a 1000rpm shot.