If I get Android Scientists I get 4 of them. If I get Android Helmsmen I get 3 of them. (for +4 RP or +3 Defense respectively).

Which however is more efficient for raids?

I'm guessing +4 from the Android Scientist is a bigger bonus to raid 'crew' that a +3 from Android Helmsmen, I'd just like confirmation this is right.

Thanks

As far as we know, that is correct.

Though in the end, it doesn't really matter. You get what the RNGoddess gives you. And before you get any bright ideas, they are not worth the 14-16GP to buy them. Use your scientists and try to save your helmsmen for velox thrusters (100 AH, 200 Void Shells) from the CT Lab. If your legion doesn't have it discovered, go hang out with someone who does for a week so you can execute the blueprint.

If you want Android Scientists just up your artifacts production , There drop rate is so high I get 3-4 for every Android Helmsmen.
Android Helmsmen will help in a fight to.