Originally Posted by
randyc
There are industry standards so there "should" be no issue with using different manufacturers. There is some vertical adjustment but not 1/8 inch. Toggle style devices are a little more forgiving than larger opening designer devices. Vertical alignment is determined by the wallbox. Boxes are typically nailed to wood studs, which, if not perfectly plumb could create issues. Sheetrock can also press on the box.
You can try lightly tapping the device mounting yokes (one up, one down) to see if you can get them to align.
You can try to trim the sheetrock to keep it from pressing on the box.
You can try Lutron Claro plates. Leave the devices ~1/4" out of the box, attach the back plate then tighten.