My experience with WotC's series has strictly been with the Miniatures and the Atlanta Gaming Groups free RPG adaptation (SWM Campaign Edition) of it. SW Miniatures is D20 based, but it's really more of a table top skirmishes game than anything. I've sat down at a few SW Saga RPG tables and I didn't mind the D20 aspect, but I've had a fair amount of exposure to D20 Modern. I did get enough hands on with it to know the recent Saga edition was a big improvement over WotC's previous edition.
If FFG is indeed the holder of the license, I suspect they'll treat SW miniatures in a similar fashion as their Mutant Chronicles series. I haven't every played MC, so I don't know if that's good or bad?
My greatest hope is that the miniatures are on the same scale as WotC's, so that the previous figs can be adapted into the new with a bit of modding.