2m resolution heightmap without WP or 1m resolution heightmap with WP?

I was making the procedural material for my map that has world partition and I was thinking which would be a better option between these two:

  • 1m resolution heightmap that is 12k x 12k and therefore needs world partition forcefully (now in use)

  • 2m resolution heightmap that is 6k x 6k and therefore does not need world partition

What is the benefit of having world partition?