On the Japaness servers have SEG max is 200M hp our bosses are capped at 60 M atm but they in next event they might be rasied. I passed max hp was 50M.
We also only have to clear 200 stages. while they got 300 stages at Japaness servers.

Players get stronger all the time so they raise the bar.
Japaness server also ave EP reward all the way to 1000M EP not just to 3M EP like here.