A tool I didn’t know i needed. It is great. On sale for $10. I tried it and it is absolutely awesome.
I confess I've always turned my nose up at both kinds.
This is what I have used for 50 years. I still have it and it still works just as well today as it did when I got it. It can also be mounted in a fixture to dress bigger wheels or surface grinder wheels.
It is sorta like @Ironman 's diamond drills but purpose made.
Diamond Dresser Single Point Grinding Wheel Tapered Point Tool 2.00 Carat - 1/2 Inch x 6 Inch https://a.co/d/2kSP3Co