We've used both
It's been awhile since we used Dry Slurry though.
Truthfully, we never really used emulsifier thru the TM to "clean" with though.
Just enough to condition the water.
We always pre-spray to do the emulsifying.
So I really can't judge which "cleans" better alone
What I like about Heat Wave, it's one of the best for keeping scale down.
Have you tried Genicare Clean-It?
It's really good stuff.
It foams more than I like, and doesn't fight scale as well as Heat Wave or we'd use it all-de-time.
The fragrance is one of the most pleasant I've ever smelled too
..L.T.A.