Oh for gosh sakes buy it. Whats the choice? This a/c gets no love, a bad run of stuff in 1/72 and worse in 1/48.
Maybe the Kinetics kit is better, maybe the same kit. My vote, buy it now while it lasts.
As for the prototype, that is a very nice airplane. I saw one at Reno, and the whole history of the tank buster effort in the 6 Day war.