I can give you this. It are 2 sketches I made of M15 a couple of months ago. One was with the 12" dob, the other with the 4.5" newt on eq-2
With 12"
Magnification was 240x (12.5mm + 2x barlow). Very bright core, some stars were visible. I hope to se more when I'm out someday this your (I hope)
With 4.5"
Sketch was made with a magnification of 144 (Orion Highlight Plössl 12.5mm + 2x Barlow). No individual stars, just a fuzzy ball.
As you can see I'm not a very talented person when it comes to sketching
.