All 3 models have the "factory" listed top speed of 425mph at rated altitude.
P-47D-30: Higher horsepower engine, higher MAP pressure, paddle prop modeled, more ordnance carrying, has speed/dive flaps, bubble canopy. My favorite model Jug.
P-47D-25: Brazilian markings, not sure why it is not called a Razorback, as it still has the older style canopy. Pretty much the same as the D-30, minus the dive flaps, and I believe a tad less HP.
P-47D-11: True Razorback. Lightest of the AH Jugs, which isn't saying much

Best of the Jugs in the turns, can surprise others with it's low speed handling IF the fuel load is light. Has the toothpick prop. Not sure, but I think the climb is supposed to be lower on this one, due largely to the prop. Only carries one 500 lb bomb, or one drop tank. Lower internal fuel capacity in this Jug.
I like to take the D-30 most of the time, as the views are better IMO, I can put out the dive flaps and "feel" safer in my dives (purely psychological, I know....AH dive flaps in the fighters have no noticeable effect). If I want to goof off, I take the D-11 and do more turning in it. But I hate the 6 views in it, the canopy braces get in my way a lot, etc. Ammo, sancho, and if the tard ever comes back, FRENCHY are the masters of the Jug. Drex, master of all the planes in AH, is also a killer in one of these birds. I am but a flunky, master of none of the above; but I love the Jug and can't wait til someday we get one set up to fight like the "in the field" ones.

Hopefully, ammo or sancho or Drex will chime in here and enlighten you more on the wonderful attributes of "Jug"philia. Hope I gave you a rough idea of what we have in the AH P-47 planeset.