The ONLY advantage of Prado is the resale value.

Both are not real Off-road options. So for on-road CX-9 is much more fun to drive (acceleration & Stability) and much better looking.
The myth of the Toyota being more reliable is a very local belief that has no facts to support it.
Also don't fall for the claim of low cost maintenance of Toyota. I have a LC; the brakes Master and booster costs 8000 QAR which is double the CADILAC ESCALADE that is claimed to be one of the highest when it comes to maintenance cost.