Hutech say their filter gives a better colour balance here
http://www.sciencecenter.net/hutech/idas/lps.htm
The UHCS is more severe I think, and cuts off some of the refelction nebulae of objects like the Triffid, though my place is quite light polluted.
I once saw the Triffid through Orion's Astronomik CLS filter and was amazed to see that it darkened the sky and increased the Triffids visibility but that included the blue reflection nebulosity as well. It would be interesting to see how that filter goes photographically. Sadly its $310 at Bintel, not a cheap filter.
Scott