Yes, screw holes are different. ;(
I had to drill new ones and then fill the old ones in with some sort of liquid electrical tape compound.
Stippling was with a a soldering iron. It was very easy and only took about 15 minutes per side, with no prep required. The tricky part was keeping that plain border, which took a bit of effort.
It is so easy and so grippy, with no downsides, that I now do it to every pistol of mine that has a plastic or rubber grip. If you have felt the Sig E2 grips, that is exactly what stippled grips feel like.