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1. Currently has more heroes
Overwatch 2 currently has 42 heroes, meanwhile Marvel Rivals has 37
2. Had more heroes at their initial launch
Overwatch released with 21 heroes, meanwhile Rivals launched with 33
3. Have 3 roles in total
Overwatch has Tank, Damage and Support, while Rivals has Vanguard, Duelist and Strategist
4. Is 6v6 at its current form
Since Overwatch 2's launch, it became 5v5, while Rivals is 6v6. Although 6v6 might return permanently to Overwatch 2 in the future!
5. Have heroes with a hook-like ability
Overwatch has Roadhog, while Rivals has Winter Soldier
6. Have heroes locked behind a paywall
Since Season 10 of Overwatch 2, all heroes are fully available for free!
7. Have a sniper character with "Widow" as part of their name
Overwatch has Widowmaker, while Marvel Rivals has Black Widow
8. Every part of the map is destructible
In Overwatch 2, only railings in some maps are breakable, meanwhile every part of the map is destroyable in Rivals
9. Had role queue at the game's launch
Rivals has no role queue, meanwhile Overwatch introduced role queue in 2019, 3 years after launch
10. Have hero bans in competitive mode
It is only available from Diamond though!
11. NetEase Games oversees operations in China
Rivals is owned by NetEase and even though Overwatch is owned by Blizzard, NetEase does oversee Overwatch in China
12. The main antagonists in the game's story being robots
13. Have golden variants of weapons
14. Has longer seasons
Overwatch seasons last ~9 weeks, meanwhile Rivals seasons are planned to last 3 months (~12 weeks)