I have been using the Topaz Lab Plug Ins for PS CC (and LR) for a number of years now and until the recent release of "Topaz AI Clear" (for Noise Reduction & detail sharpening) I used to use "Topaz DeNoise" as a Filter Plug In inside PS CC and found that it did a really good job.
I have just received an e-mail from Topaz for a free download to a (new) "Topaz DeNoise AI" application which I have downloaded and installed.
I haven't had an opportunity to exercise it yet, or compare it with "Topaz AI Clear", but if you have previously purchased Topaz DeNoise you may be eligible for a free upgrade?
Cheers
Dennis
UPDATE: From the Topaz e-mail:
"We're really excited about DeNoise AI – in our tests it's created far better results than both AI Clear and the old DeNoise plugin. Thanks so much for supporting us, and we can't wait to see what you create!"