there's a lot more difference than that. tilke predominantly uses flat plain boring surfaces, adds unnatural and ridiculous chicane angles creating a plastic, soul-less track. all tilke tracks are built on (mostly) near flat surfaces, and the entire track is artificial. in india the hills was added artificially. turkey is an exception of tilke's and is probably the better one to race on.
old race tracks, and old hockenheim used the contours, undulations and curves of the terrain. sure they might dig out some of the terrain, but IMO the older tracks use the natural terrain more than these newer ones... and the track layouts are better in the pre-tilke world.
tilke couldnt design suzuka or nurburgring. it's not his style.