If McGregor bounces after the Mayweather fight, and Rousey doesn't come back, they're pretty much at near-parity..
not even close to parity.
number of top ten fighters per division (using fightmatrix global mma rankings)
Flyweight
UFC 9
Rizin 1
Bantamweight
UFC 8
Bellator 2
Featherweight
UFC 8
Bellator 2
Lightweight
UFC 8
Bellator 2
Welterweight
UFC 9
Bellator 1
Middleweight
UFC 10
Bellator 0
Light Heavyweight
UFC 7
Bellator 3
Heavyweight
UFC 10
Bellator 0
The only division where they are even slightly a rival to the UFC is light heavyweight where they have three fighters (Davis, Bader and Vassell). Every other division their lack of depth is shocking.
Even tonights event, yes, theyve put together a main and co-main with four recognisable names, but 3 of the 4 are well past their best, two are former ped cheats, and the matches are really nothing more than a nostalgic jerk off session for pride fans.
What about the rest of the card?
Chandler v Brent Premus (who),
Lima v Larkin,
Aaron Pico v some guy without a wikipedia page
Compare that with the UFC NY Card, UFC 202
McGregor v Alvarez, Woodley v Wonderboy, Joanna v Karolina, Romero v Weidman, Pennington v Tate
However much competition would be good for the UFC, Bellator arent even close