Vernor have more drag?

[Jestersage]

While fine tuning my SSTO, I created a variant that use Vernor as RCS instead of Linear thrusters.

The original version use the 1.8m RCS tank, while the Vernor-variant utilize 1x TX440 (other wise it will have no oxidizer). Placement of RCS thrusters, amount, and orientation obviously also differ, but in terms of part count the Vernor-variant takes 4 less parts.

Yet when I flew the craft, I find it does not perform as well, so my suspicion is on drag. (the mass difference should not contribute much, as it was only 625kg difference for the tank) - delta-V difference is about 300 m/s when reaching similar 80k orbit

Now, I am aware that both vernor and linear thrusters have drag; however, since they are all placed on the body radially, both solution would have induced drag.

Thus, I am wondering if there is an orientation of drag for vernor, which does not exist for linear? According to KSP wiki, both linear and Vernor have same drag value.

EDIT: found answer on my own. Unfortunately, if you rotate a vernor perpendicular to the traveling direction, you do have increase in drag force according to AeroGUI.

Edited November 24, 2019 by Jestersage