Howdy!
I like the F4U-4. I've always liked the four-bladed prop on a Corsair.
Also, I had built Revell's old F4U-1D Corsair three times, so Trumpeter's later version was a welcome change!
As far as one kit being better than the other, they are bacically the same kit except for the different pieces needed to change the F4U-1D to a F4U-4.