For ORCA inputs using "Gaussian's B3LYP", automatically include "NoCosx" keyword to more closely match Gaussian results (ORCA uses RIJCOSX by default).
Similarly, add option to do "ORCA's 6-31G*" that requests Gaussian use 6-31G(d) with 5d/7f rather than the default 6d/10f, and similar for other Pople-style basis sets.