Best practice guideline for the KML when defining a Place

I’m wanting to add our local park as a Place in order to assist with pest plant eradication & native identification. I can either use the very accurate (124-point) OSM KML or my rough (<20 point) Google Earth KML. I’ve read the warnings about the system load from Places and am assuming, possibly incorrectly, that larger KML’s place a greater load. If this is the case, I would go with the rougher boundary definition. Advice, please!

I think the issue with place size is more about the number of observations than the number of points in the polygon. So I would say go with more precise one.

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