RE: Let's talk about servos - Whatever is on your mind
So order two of each and test them!
A concern can be stall current. I really don't think that you will need all of that torque. I'd likely route the servo power such that the receiver does not see the current.
The Mfrs manual for the Model Tech Formula 3D is on the web. It calls for HiTec servos. The particular one had a bad rep at one time.
Using the servo referenced in the manual for specs, you can find quite a few alternatives.
The manual spec'd servos that are quite a bit faster than those you were looking at, and have much less torque.