The 90's re-issue came in the original style box, with the exception being the omission of the 2.5 Championship logo. The latest one has that awful Revell picture/art/photoshop mess with the picture being that of the restored car.
And from what I am hearing, the newer issue has better done decals and the one piece tires.
Original Issue
1996 re-issue
And the last issue
And just for fun, the Union Japan kit from the late 80's early 90's
And the Advent version