Depends on how much you overlap planetside. When I did testing not too long ago: if you perfectly overlap within say 5 minutes of your last drop, you'll be near 0-5% HR with no change in TT per claim found (including if you vary depth on the 2nd drop). There's only a little "respawn" in that amount of time. If you think about how area of a circle works though, you're still covering over 50% of your finder's circumference if you move out 55m instead of 110m. Move a bit closer to 110m, and you won't be able to easily detect a difference until you track medium-term returns and/or have really sensitive statistical test data.
If it's "indoors", you have to work to overlap, so I wouldn't think most people would ever do it there.