Red light has longer wavelength, so you would get less resolution; although for large-ish scopes seeing is the limiting factor more often than not. You'd get the best resolution with blue or violet light (double that of red), but our eyes (and brains) are most sensitive to green. So green is a good compromise I guess.
I use an ND (neutral density) filter combined with a blue filter (80A) on the Moon, and find it much more agreeable than the green Moon filter.
I would like to try through a polariser. It should highlight different features as you rotate the polarisation angle, depending on the angle of reflection of the sunlight. Whether it does or not depends on how specular the Moon's surface is, I guess.
Anyone notice the view change when rotating a polariser (or the eyepiece with the polariser attached)?
Now, why don't I just try with my polaroid sunnies?