Engraving Tool vs. Small End Mill

I want to use my CNC Sherline mill to engrave a grid pattern on some
aluminum. I want the size and depth to appear about the same as if
you ran your scriber over the surface. I have seen both small end
mills and engraving cutters available. Which would be the best choice
for this application? What are the pros and cons of each? Is there
some other tool I should use? I am just begining to learn to use my
CNC conversion and have not tried any engraving yet.

Bruce Buchner