What's that library doing?

Which is better for graphic display of large simulations OR is it the same-ish?

Right-click on a geometry and choose “Save As Library…” – is it unloading the large (75mb+) .stp file that the original geometry is by saving the original in the “Libraries” folder wrapped in a .rslib file and displays a mysteriously lesser graphic but still allows snapping and the selection of individual part bodies.

OR

Right-click on the geometry and choose “Export Geometry…”, save the large (75mb+) .stp file out of RobotStudio as a much smaller .rsgfx file (only 15mb), and then import that .rsgfx back in to RobotStudio? The .rsgfx turns the .stp into a single body graphic, but at least it’s still snappable and collision detectable. Then, save the original .stp file into the Libraries folder so it’s available if a individual part body edit is needed in the future.