The airspeeds are quite similar to the T-6, it was a straightforward transition for me. The hard part was learning how to fly a jet... T-6 stopped in mid air and dropped out of the sky when you when idle boards.... T-45 just keeps going, and going, and going.
That's kind of what I figured. Speeds between the two don't seem too cosmic, but having a barn door out in front plus boards would seem like it would make it easier to correct a high/fast situation.