Tilemap vs Sprites for large layouts?

What should be better in terms of mobile performance for large layouts design:

A) Tileset of 3-5 tiles total, with each tile of 1024x1024px and entire tilemap size of 15000x15000px (single but large object);

B) Single sprite 1024x1024 with 3-5 animation frames placed across layout (many big but static objects).

Thanks dop2000!

the full image will be pretty big (2048x3072px).

As I understood he says: "The size of the object in the layout doesn't matter" and then later he probably means sprite: "cannot be over 4096 pixels". Don't you think?

So don't add more than 6-8 tiles to the tilemap.

Do you mean add 6-8 to the tileset or to the tilemap object on the layout?