I've programmed both for my Brio... If you were close enough living here I could link and transfer the settings. The 10X does it thruogh datasafe, which can be e-mailed. I had a about a hundred Brio sequence flights on the 9303 and severa hundred on the 10X.

They are both excellent, easy to program. The 10X I believe has a slightly softer, better expo curve. At least I can feel a difference in the expo resolution. Just my perception. Its the best of any radio I've flown.

The 10X also has built in rudder to aileron, rudder to elevator mix setup, which makes programming easier. It also has a dual elevator pre-setup in the wing menu. Again, very easy to setup.

The 9303 has P mixes that you program these independently. Not hard to do, very intuitive actually, but an extra step.

So between the two the 10X has the advantage. The 9303 is a tremendous radio though. Capability-wise they are equivalent for most pattern applications. I love the throttle curve on both of these radios.

Good luck with your decision.