Powers Vaul has that Mekhane doesnt: Life & Death Manipulation, Telepathy, Telekinesis, Vast control over all forms of psychic energy
Powers Mekhane has that Vaul doesnt: Regenerationn (Low-Godly), Biological Manipulation, Technological Manipulation, Law Manipulation, Information Manipulation, Matter Manipulation, Light Manipulation, Perception Manipulation, Metal Manipulation, Radiation Manipulation, Data Manipulation, Morality Manipulation, Transmutation, Probability Manipulation, Causality Manipulation, Conceptual Manipulation
Mekhane's got a lot more in the hax and versatility department, and Vaul's Intangibility wont really help much seeing as Mekhane can hit Yaldabaoth, but i get the feeling Vaul's page may be missing some powers, just a hunch.