Dave, since you posted in the RV4 section I presume you were asking about the RV4 plans, not RV7.
I am at the 99.5+% point in the build and have not yet noticed a difference. Unlike the RV7 plans, the RV4 plans are not new. They have barely changed for many years. I expect there are changes this millenium, but I have not yet spotted any.
The question is a little academic though because when you get the kit, fuse, emp, wings etc., you get the full size plans included. So just enjoy the preview plans and get that order for the emp in.
Glad to see you are looking to build the best in the range.
Cheers,