I've got a 3038 JD after years of other tractors - lastly a JD 2030 - with individual brake pedals. And I used those pedals for tight turns and other things. But these CUTs have such a tight turning radius that I really haven't missed the dual brakes. You do activate the diff lock with a slight push on the brake, but it doesn't activate if you just push it to stop. Of course, the brakes on these little tractors don't get that much work anyway because you can slow effectively by releasing pressure on the directional pedal. At least that's how it works for me.
Life is full of tradeoffs, and losing the individual brake pedals on a small tractor for me is just no loss. Biggest negative tradeoff for me is the narrowness of CUTs and their inability to maneuver across any significant slopes the way my older, bigger tractors could. But, with old knees and such, it was just getting too hard to mount a 60 horse-plus tractor.