Having only used the Poli-Seal, I can't compare it to the Polish.
According to the product advertising, Poli-Seal is slightly less aggressive than the Polish.
The Polish appears to be just that, a polish.
Poli-Seal is an AIO product that people feel leaves a pretty good layer of protection after use.
While I haven't used the Poli-Seal on any really bad paint, anytime I have used it, it has done a good job.
It seems to be somewhat similar to Klasse AIO in its intended use, but with more corrective capablities and supposedly, more protection left. Since I don't use it as my LSP, I can't comment on the protection or durability. It does leave a finish ready for an LSP.
Charles
assout: Pro's -- Con's