Am I comparing apples to oranges here? CG website doesn't explain them well. Does either one clean the surface of old LSP? How is the look of each product, do they darken or brighten the paint?
The one main difference I have found is that Wet Mirror fills way more than EZ Creme. They aren't designed to clean old LSPs as they are glazes and are designed to add to what you have. They will add depth and wetness.
i have both and wmf changes the look of the paint ...it significantly darkens the paint even on light colors i have noticed it (honda championship white, toyota alpine silver) but i always seem to have removal issues on dark paints, the product comes off no problem but you can see the outline from the black uber pad. usually a second wipe before lsp takes car of it after it has had a few minutes to dry. i usually only use it under a nuba ez creme on the other hand seems to make the paint glow, its hard to explain and leaves it very slick. i have always used this under powerlock and have seen the same durabilty with/without it 3-5 months
I have a sample of EZ Creme - got it 2 years ago, never tried. I looked at it last night and it looked like thick pudding or old jello, is it still good or should I toss it?
Both products work best with DA polishers, slow the speed down and wipe after each pass as the product does not need to set up or cure in my experience. Wet mirror works great as a final glass polish even if no correction on the glass is needed as well(fyi).