**Choose angular crushed stone over rounded gravel.** If the “uniform gravel” means pea gravel or smooth river gravel, the **5/8-inch minus is better for stability and leveling**: its angular pieces interlock, and the smaller particles fill gaps so it compacts firmly.

There is a drainage tradeoff:

- **5/8-inch minus:** compacts into a firm, easily leveled base, but its fines reduce drainage.
- **Clean crushed stone, roughly 3/4 inch:** provides good support and better drainage around wooden skids. This is the material recommended by shed-foundation installer [Site Prep](https://www.siteprep.com/articles/how-to-install-a-gravel-shed-foundation/).

For a typical skid-supported shed, I’d favor **clean angular crushed stone**, especially on a damp site. Whichever you choose, remove sod and topsoil, place it on firm ground, compact it, and keep the finished pad above the surrounding grade so water can escape. Good preparation matters more than the difference between those two crushed-stone products.