No it isn't.
In TRON you leave a trail behind. In Snake, you grow as you eat and drag your body along the path you crawled.
TRON's trail is static, Snakes body is dynamic.
> TRON's trail is static, Snakes body is dynamic.
And that difference only exists to support the single player vs multiplayer dynamic. If Snake left a Tron tail then it would be a very short, unfun experience. If Tron didn't leave a permanent trail then matches would last too long.
Maybe the single player vs multiplayer difference only exists to support the different tail mechanics.