The key combatants:

USA

F-35/F-22 and

A UCAV roughly based on the US DARPA J-UCAS prototypes the Northrop Grumman X-47B



https://en.wikipedia.org/wiki/Northrop_Grumman_X-47B

And the Boeing X-45

https://en.wikipedia.org/wiki/Boeing_X-45

But with the following specs:

General characteristics

Crew: 0
Length: 26 ft 6 in (8.08 m)
Wingspan: 33 ft 10 in (10.3 m)
Height: 6 ft 8 in (2.14 m)
Empty weight: 8,000 lb (3,630 kg)
Powerplant: Reaction Engine Scimitar

https://en.wikipedia.org/wiki/SABRE_(rocket_engine)

Performance

Maximum speed: 1,034 kn (1,190 mph; 1,915 km/h) at 40,000 ft (12,000 m)
Maximum speed: Mach 1.8
Cruise speed: 574 kn; 1,062 km/h (660 mph)
Range: 1,089 nmi (1,253 mi; 2,017 km)
Combat range: 400 nmi (460 mi; 741 km) air-air mission
Ferry range: 1,800 nmi (2,071 mi; 3,334 km)
Service ceiling: 50,000 ft (15,000 m)
Rate of climb: 50,000 ft/min (250 m/s)

Armament

Guns: 1 × General Dynamics 25 mm - 180 rounds[j][77]
Two internal bays with a capacity of up to 5,700 lb (2,590 kg) in rotary launchers
Missiles: Air-to-air missiles eg CUDA HalfRAAAM / Air-to-surface missiles: eg Joint Air-to-Ground Missile (JAGM) / Anti-ship missiles eg Joint Strike Missile (JSM) / Long Range Anti-Ship Missile (LRASM)
Bombs eg Small Diameter Bomb II (SDB-II) / GBU-53/B

RUSSIA

Mig-35/Su-35/Su-57 and

A UCAV based roughly on the Mikoyan Skat



https://en.wikipedia.org/wiki/Mikoyan_Skat

With the specs of the 5th gen T-50 (Su-57)

General characteristics

Crew: 0
Length: 19.8 m (65 ft)
Wingspan: 13.95 m (45 ft 10 in)
Height: 4.74 m (15 ft 7 in)
Wing area: 78.8 m² (848.1 ft²)
Empty weight: 18,000 kg (39,680 lb)
Loaded weight: 25,000 kg (55,115 lb) typical mission weight, 29,270 kg (64,530 lb) at full load
Max. takeoff weight: 35,000 kg (77,160 lb)
Fuel capacity: 10,300 kg (22,700 lb)[162]
Powerplant: Izdeliye 30 turbofan
Dry thrust: 93.1 kN / 107 kN (21,000 lbf / 24,054 lbf) each
Thrust with afterburner: 147 kN / 176 kN (33,067 lbf / 39,566 lbf) each

Performance

Maximum speed:
At altitude: Mach 2 (2,140 km/h; 1,320 mph)[161][163]
Supercruise: Mach 1.6 (1,700 km/h; 1,060 mph)
Range: 3,500 km (2,175 mi; 1,890 nmi) subsonic
1,500 km (930 mi; 810 nmi) supersonic[96]
Service ceiling: 20,000 m (65,000 ft)
Wing loading: 317–444 kg/m² (65–91 lb/ft²)

Armament

Guns: 1 × 30 mm Gryazev-Shipunov GSh-301 autocannon in right LEVCON root
Hardpoints: 6 × internal
Missiles: Air-to-air missiles eg K-77M phase array missile, air to surface: KH-31F / AS-17 'Krypton' air to ground missile, several variants
Bombs: Grom 1, Grom 2