When I was beginning to look at small tractors, I mentioned to the Kubota dealer that I liked the forward/reverse pedal set up on the John Deere better and he agreed. We test drove a Bx2350, a B2920, and a B7800. I noticed the abrupt stopping in reverse with the Bx2350 which I thought at the time was more me than the machine, but I guess that was an issue with that model. We ended up selecting the B2920. Now when I get on our John Deere garden tractor, the pedals on it which are the same as the 2305 seem strange. Actually when I was pushing snow in reverse using the rear blade, I was thinking it helped to have the reverse pedal where it is on the Kubota. At any rate, you get used to that the 1st day you have it. I have never given much thought to the brakes on the right because frankly other than depressing it to set the parking brake, I hardly ever use them. Although because mine are split, there is some rational to putting them on the left so you could use that feature on snow or when using the FEL.
In then end, you probably won't get convincing evidence to go one way or the other. If you want green, buy green. When I buy what I want and have a problem with it, I am always able to rationalize I would have had problems with the others too. If I don't buy what I want and have a problem, I am always thinking I should have bought the other. Just try and find a dealer you are comfortable with.