In general, ya pays yer money, and ya gets yer choice. :-)
In the Perfect Path Technologies "Total Contact" thread, there were a couple of members who had said they were going to try the Mad Scientist product because it was a cheaper alternative. They never reported back.
I haven’t seen the MS product, but supposedly, its emulsifier is an oil that is quite messy. The PPT product has the consistency of a thick paste, easy to apply, and if you’re careful ... not messy at all.
On the expense ... There’s enough Total Contact in one tube to treat two large systems, or one system plus other applications, like a TV system, wall plugs, etc. And, it works like crazy.
Go to the "Member Review forum and check out the Total Contact review and the various comments from users. The only negatives in the entire multi-page thread came from those who hadn’t tried the product.
Here's the link: https://forum.audiogon.com/discussions/new-tweak-its-fantastic