Tighten up projection equality check

[chemix-lunacy]

This improvement is teired:

Firstly the equality check should be tightened up, currently it just does a to-string on each operation and compares 1-to-1. This should be replaced with a non to-string version and check against values instead. This should likely only be complete after projection state representation has been updated.

Secondly it should use state the prediction mechanism to detect whether the results are the same, which is a better check than if the exact operations are the same.