I don't think that the comparison is valid, but any comparison is interesting. That's what I like in the simulation, we can fly such different aircrafts and have a look to what differs !
That said, the max. speed at sea level must be 323 KTAS, and 337 KTAS at 10.000 ft according to the manufacturer. So I think your values are pretty good.
For the autonomy, I've not checked the distance, but if you can fly the normal distance with 244 L less than the real plane, I presume that the consumption isn't right...
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