been to both.
walking - well if you want the main pool at OKW - ask for near the HH
here is a map
http://www.wdwinfo.com/maps/OKWMap.pdf
for SSR - ask to be hear Grandstand or springs. here is a map for it.
http://www.wdwinfo.com/resortmaps/Saratoga.htm
they are both big. like the moderate resorts - CSR, POR and CBR.
but they are more deluxe - bigger rooms, queen beds instead of double.
both have kitchennett in the studio and full kitchens in the 1-bedroom and up.
getting back and forth to the parks - OKW is a little closer - but not alot. both OKW and SSR have multiply stops before the bus leaves to go to the park.
(which I appreciate - means don't have to walk a half mile to get a bus) but some people want only one bus stop (hope this NEVER happens)
OKW is laid back - old floridian. here are pictures
http://photopost.wdwinfo.com/showgallery.php/cat/545
SSR is like that place in NY.
http://photopost.wdwinfo.com/showgallery.php/cat/547
SSR definitely has nicer stuff in their villa - but OKW is more like home (okay at least to me).
either would work.