Loiter Climb and Descend Rate

I’ve searched the wiki and google but I’m not sure I am understanding this correctly, so if you know, please just help a brother out:

I want to ascend and descend faster in Loiter mode. What parameter do I change for this?

copter.ardupilot.com/wiki/arduco … T_VELZ_MAX

This applies in both directions up and down, and applies in both Loiter and Alt Hold.

These two parameters control the climb and descent rate in Autopilot modes:

copter.ardupilot.com/wiki/arduco … V_SPEED_UP

I believe they were done separately because you might wish the autopilot to behave a bit more gently than you would when you are controlling it.