there isnt anything remotely similar between them
TO was about size, physicality, strength. his weaknesses were hands and somewhat sloppy routes which he made up for with athleticism and being a bigger target. youd give the ball to TO on screen, slant, intermediate post and watch him go to work and break tackles.
nelson runs great routes, is shifty and relies on precise timing which coupled with a great qb like rodgers makes it really hard for defenses to play against. his weakness is lack of strength, he can be pressed to throw off the timing. he has good hands.