Neither label guarantees eligibility. A branch is part of the same organization in another location; a subsidiary is a separate entity whose qualifying ownership and control must be shown. Both require the remaining L-1A elements.
Choose structure for the real business
Obtain appropriate corporate and tax advice, then have counsel assess the implemented arrangement. The beneficiary still needs qualifying foreign employment and a primarily managerial or executive U.S. role.
A newly registered branch or subsidiary also needs analysis of actual operating history to determine whether the new-office framework applies. Immigration convenience alone should not replace review of the commercial consequences. Labels are the common trap here: a title on an organisation chart gets treated as though it answered the role question, and a corporate form as though it answered the relationship question.
Neither does. The classification asks what the transferee will actually spend the working week doing, and whether the two operations are related in the way the evidence claims. Hypothetical example: a managed cybersecurity services provider names its incoming transferee a director and points to a branch registration; the daily work described is incident response performed personally, which is not managerial or executive, and the registration says nothing at all about the year abroad.
Two separate gaps therefore remain open after the structure question has been settled.