Since you posted on the gleaner side, we are mostly gonna side with the R, but both machines will treat you right. Go with what your familiar with. If the 65 has a M11 your gonna notice its REALLY thirsty compared to a SISU engine'd combine or even a 8.3 liter cummins.
I'd say having flipped from red to silver that if it was a 2388 they'd be very similar but with it being a 2366 the R65 would eat it for lunch. But just like redline said on the Gleaner side we're going to be biased