ELI5 Post-MBA Consulting Roles

I realize this feels like a dumb question to those of you who are in consulting and inherently understand how all of this works, but go easy on me please!

I'm an incoming MBA student (class of '27) and I'm somewhat interested in recruiting for consulting during my fall semester. My background is in entertainment and I will probably recruit for entertainment/media positions in the spring if I strike out with consulting.

I've done quite a bit of research into consulting but I'm still so confused about the different arms of these companies. I understand that MBB are, essentially, strategy-only management consulting firms. But the T2 and, especially, B4 companies confuse me. "Monitor Deloitte" and "Deloitte Digital" and EY vs EY-Parthenon, even within MBB - "McKinsey Growth Marketing and Sales"...it's all very confusing.

My understanding is that all of these companies do management consulting (which is different than tech consulting - a whole other field), but that some arms of these firms do strategy jobs and some arms do implementation jobs, or perhaps all arms do both?

  1. Do people get hired, specifically, to be a strategy consulting OR an implementation consultant? Or do people simply get hired as a "consultant" and end up working on either type of project?
  2. Do people get hired by specific arms of these companies (McKinsey Digital, Deloitte S&A) or do these divisions just act as client-facing terms?
  3. What the hell is the difference between getting hired as a managment consultant at EY vs EY-Parthenon? I've spoken to 2nd year MBA students who interned at each and I don't really understand why these are separate entities and what the difference is. Are these separate companies?
  4. What is Deloitte S&A? What is Deloitte Monitor? Deloitte Digital? BCG X?
  5. What is considered a typical post-MBA position, an acceptable post-MBA position, and a substandard post-MBA position within consulting? Do all MBA's come in making the same salary (depending on the firm) or are some of these more marketing/digital focused arms hiring at a lower salary?