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Well - I took the plunge to try and answer this question for myself and although I can't offer any formal analysis my simple observing experiences over three different nights now is that the Astronomik CLS filter certainly s***'s all over my old baader moon & skyglow. This is not to say the baader ain't a bad filter at all and I won't be parting with it either but the astronomik simply changed everything in my backgrounds from a light-polluted grey or on a darkish night -dark grey (with the baader) - to a solid black with the CLS. Whereas before vague hints of nebula were slightly visible (with the Baader) the CLS makes them clearly prominent (in terms of LPR). My biggest worry was perhaps the filter was cutting down light pass too much for such things as planetary observing but tonight was my best clearest night and I was able to compare with and without the CLS and it made no difference to clarity with magnification but contrast was certainly improved.
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