A 6" does not really show much.
Hmmm. Don't tell that to my 6" refractor... One of the finest views I've seen of M13 was with a 6" f/8 achromat and binoviewer with 20mm widefield eyepieces, working at 60x. It was not the view with the most stars resolved, but it was of an exquisite beauty I've not seen in any other scope since.
Not doubting that it was beautiful, but IME, globs look MUCH better with large aperture and high power.