Lutron. Having said that, the choice of dimmer depends on what you're dimming. Some devices would require a magnetic low voltage (MLV) dimmer while others a electronic low voltage (ELV) dimmer depending on the power supply requirements.

Using a standard resistive dimmer in place of a mlv dimmer may seem to work, but it is unsafe.

dimming low voltage

I've no experience with the Leviton but did use the Diva with a low-voltage LED light system installed in a set of bookcases and cabinets. The setup was a bit complicated since the dimmer is a conventional 120v wall switch but the lights are 12v and powered by a 12v power pack that's connected to the Lutron switch. The LED manufacturer (Hera Lighting) specified the make and model of the switch and the Lutron Diva was the one they picked for the application.

You may wish to consider calling the manufacturer of the lights and asking them to specify a switch for your setup.

Custom Bookshelves for Private Library · More Info

It worked out well and so far, no calls or complaints from the owner so it must still be working fine.