Actually at least one cateogory, EB1-C, specifically applies to managers relocated from an overseas branch of the same company. An equivalently qualified manager on H1-B in the US is ineligible for that category.
Equivalently qualified manager on H-1B would have spent a year out of last 3 serving in such a position overseas so he would also be eligible. Alternatively, a L-1A manager who already spent more than 2 years in the US would be ineligible.
