I need to repair some tiles in our bathroom. I did a reasonable job of
matching the color using Mapei Ultracolor sanded grout.

However, the surface texture of the old (sanded) grout is more like 60
grit sandpaper (like popcorn texture in miniature) while the surface
of my new grout is more like trowelled morter.

Do I need a special type of grout or additive or finishing/tooling
technique to get the grout to have a similar texturing?

Thanks