Sprite vs Tile Efficiency Question

Let's say I'm building a square room (top view).

This room has a floor and 4 walls.

The sprite version of this room is 256x256 (65536 pixels).

The tiled version of this room could use 2 tiles (each 32x32)

1 for the floor texture and 1 for the wall texture.

It would take a total of 5 tiles to build the room by drawing 4 walls and a floor with the tiles.

Is tiling "free" and would the tiled version be roughly the equivalent of displaying a sprite containing 5120 pixels? (5 32x32 tiles).

Thanks.