Is 1% the lowest low end trim possible?

Maybe a dumb question but when I used Caseta, you'd set the low end trim on the dimmer using a key combination. I could get it incredibly low to the point that you could barely even tell my pot lights were on. With RA2, I see the test low end trim and how to set it, but 1% still seems significantly brighter than what I could do with Caseta. It feels more like maybe 5% or so on the Caseta if not higher. Just wondering if there's a way to go lower or if 1% in the software is the best you can get.

I believe all the non-10v dimmers dim in 1% increments with 1% being the lowest. Mildly surprising that there is that much of a difference. I'm assuming you are comparing CL vs CL dimmer?

Lutron.com/led has report cards on fixtures they have tested. There are minor discrepancies between the same type devices. Maestro CL vs Maestro sensor CL, HomeWorks RPM vs myRoom RPM, etc.