Tank panels & little front panel, I fink not.
Rear panels yes
Centre tank panel yes
Not sure what they've changed under the panels to make 700GS panels fit over the earlier 650GS's
First picture 700GS plastics
Second piccy 650GS plastics
I know the radiator covers are different over the 650GS's & no doubt some of the plastic / fittings underneath will be different as the mounting points on both plastics are different as in the piccies.
The 700 is wider at the front.
I've had a 2013 700GS & now have a 2012 650GS SE + 3 650GS's b4 & have pulled them apart somewhat from 2010 onwards
Thats not to say they won't fit as the bones of both bikes are the same -
Engine, frames, electrics, seats etc.
But the 700 GS had quite a few upgrades - twin disks, stronger front springs, traction control, esa rear suspension & definitely front plastics, even the screen mounts are different, some screens fit on the 650 but the best one being the GIVI AF5107 Airflow screen are for the 700 2013 on.
Again would probably fit a 650GS with a bit of jiggery pokkery
I have the Wunderlich TOURING Vario screen on my 650GS, the 700 GS version is a different part number, because it mounts differently.
700GS plastics definitely look better / more modern than the 650GS twins..
Would love to know how you get on if you attempt it..