You already got the difference between Essential and Elite versions…
What bothers me more is the fact that, exactly like last year, I got an e-mail with a “special update offer” that ends just a few days before Black Friday.
Obviously, DxO still is not aware of what they really did to their loyal customers last year. After having waited a full year for features that were promised to appear in PL 2 (partly even in PL 1! - and it seems that some are not even in PL 3…), I think the very least we can expect from DxO is a very good update offer - and not trying to fool their loyal customers a second time. That means, the update offer should be a) the same amount as the (2018) Black Friday discount (50%), and/or b) the upgrade offer should not end just before Black Friday.
(My personal opinion: since PL 2 brought only promises, the PL 3 update should be free for PL 2 owners to at least compensate for the long waiting…)
Here is the thread of last year (Black Friday issue starting at post 43):
https://forum.dxo.com/t/upgrade-price/5157/43