Yes, there is a difference. There are also differences between a '63, a '65 and a '67 Volkswagen, but just as in those cars, the differences are subtle, recognized by few, and all are headed in the same direction.
Well, if you think the direction of this country under FDR was only subtly different from what this country would have been like under, say, Karl Marx, then you and I have a difference of opinion.
The reason I bring all this up, by the way, is that I think on principle we should avoid the huffing and puffing and overstatement and doomsdaying that can tend to make us less credible in the eyes of the general public.