The question is how do you integrate it with SmartThings?
There are three basic options.
One) use IFTTT. This can work well as far as turning them on on a schedule. But smartthings won’t know if someone turned the light on at the wall switch. And there may be some additional lag.
One community member has created an integration based on using an intermediary server on raspberry pi.
don’t try integrating. Lutron switches work fine with echo, so you can group them for voice control with your SmartThings switches if you want. Other than that, just use Lutron’s own scheduler, HomeKit, Wink, or IFTTT.