Ive never used Bet365 personally, but I dont think your information is right.
BetOnline has WAY more fight cards posted (today Bet365 had PFL. BetOnline had Fury, Ares and LFA as well).
BetOnline consistently posts their odds earlier. Virtually always
Props up the booty. Not as much as FanDuel, but FAR more than most. Unless Bet365 doesn't post theirs to bestfightodds.com and fightodds.io, then BetOnline CLEARLY beats Bet365 on props
Better odds in general. Want a quick test? Go to bestfightodds.com and look at which site has more red highlighted selections. 5dimes is the only one that consistently beats BetOnline on having the best posted odds.
Cash out is super easy if you use crypto, but it can be difficult otherwise. I cant compare it to Bet365 on this, but its definitely easier to cash out with BetOnline than the couple other overseas sportsbooks Ive used.
Some of the best incentives (deposit bonus', prediction contests, referral bonus', etc) anywhere