The Command engine is highly regarded. I got the Courage Pro. It is somewhere between the Courage and the Command...but much closer to the Courage.
I have been told the Courage should go 1000 hours and the Command 2500 hours. If I get 1000 hours I will be dead or close to it. I am 70 YO so even at 30 hours a year it will last over 30 years. I do about 20 "cuts" a year (cuts and leaf mulching). I figure an hour to cut the 2 acres I have. So far this year, have cut the grass 4 times. Grass goes dormant in late July and August. So this will be a light year for mower use.
It was either get the Kohler or maybe not get anything, and then face at least a 10% price increase. And I decided early on I would rather have a $5k new machine than a used commercial mower that would need work eventually.
I have a good dealer so that helped my decision.