With this mod installed, I see 2 extra roboports (energy roboport, logistical roboport) alongside the base roboport. However, according to their tooltips they have the same functionality as the base roboport, with no changes to number of robots charged, charging speed, logistics/construction range, or any other stat. Is this normal? Do they have altered functionality despite the tooltips saying otherwise?

Yes, that's completely normal, the mod adds over 100 roboports behind the scene, these are hidden to not flood your crafting menu. The Energy and Logistical roboports however, automatically transform into those different behind the scene's roboports. Those do contains the actual upgrades.

You may have noticed new technologies that my mods add, which upgrade the roboports acordingly. When placed down, the Logistical and Energy roboports have a MK XXX name. If you haven't researched anything yet, they X's will be at 0. Basically a vanilla roboport.

If you have a upgrade researched, and placed one of my modded roboports, the tooltip in the world will show you the updated stats!