No premium, looking at my best scoring games yet:
10 kill game, 12 minutes alive, 95% activity in Tiger E (6.0 BR): ~4900 RP with 100% skill bonus.
4 kill game, 14 minutes alive, 99% activity in Yak-9 (3.0 BR): ~5900 RP. with 100% skill bonus
3 kill game, 15 minutes alive, 94% activity in F2H-2 (7.3 BR): ~8200 RP with 50% skill bonus
10 kill game, 14:30 minutes alive, 97% activity in Tiger E (6.0 BR): ~5500 RP with 100% skill bonus.
3 kill game, 9 minutes alive, 97% activity in F86A5 sabre (8.0 BR): ~6100 RP with 50% skill bonus
10 kill game, 20 minutes alive, 96% activity in Tiger E (6.0 BR): ~6000 RP 100% skill bonus.
It does not look at all equal to me. If I had 100% skill bonus for all the jet games, I’d have ~10K RP (or likely much more, given I can hit 8200 with only a 50% skill bonus) in each.
The only place that has worse rewards than GRB is GAB, AAB and air sim (useful actions my behated, 86% reward at 600, 90% at 800, 92% at 1050+)
The yak-9 is a 3.0 BR plane and it out-earns the 6.0 tiger E.
And the cent mk3 (7.7) has 178% reward compared to the tiger E (154%) so even adding an extra 20% onto the tiger games to equalize with the banshee and the sabre won’t give them nearly comparable RP (it is about 600-900 RP more).