If only there was an easy answer to this one :)
The truth is nobody knowns anymore and it also differs from region to region.
Most locations have Specialist, Expert, Senior Expert, Partner. Other regions have Junior/Senior Specialist or other types of granularity. It's usually best to check directly with the location where you are applying and it also makes for a great question to ask the interviewer during the process (shows that you have a long-term interest in the firm).
I'm saying that nobody knows anymore because the firm is changing so fast it's really hard to keep up with all the different roles that pop up even when you're inside.