Object 780 ( USSR, TT-10, promotional)
Firepower:
- Dispersion from movement (max): from 0.18 (9.00) to 0.17 (8.50)
- Spread from undercarriage turn (max): from 0.18 (5.63) to 0.17 (6.03)
- Scope spread (max): from 0.08 (2.09) to 0.08 (2.50)
- Horizon speed sight shift: from 26.07 to 31.29
- Spread at 100 m: from 0.36 to 0.35
Mobility:
- Chassis slew rate: 31.29 to 35.46
Observation:
- Overview: 400 to 410
Cobra ( Britain, ST-9, promotional)
Firepower:
- Dispersion from movement (max): from 0.23 (9.20) to 0.21 (8.40)
- Spread from wheel turn (max): 0.23 (13.19) to 0.21 (12.05)
- Scope spread (max): from 0.14 (6.42) to 0.11 (5.05)
- Recharge of the entire drum: from 57.53 to 52.73
- Reload between projectiles: from 2.30 to 1.90
- Gun rate of fire: from 3.73 to 4.11
- Spread at 100 m: from 0.40 to 0.39
- Average damage per minute with HEAT (main) projectile: from 1,341 to 1,479
- Average damage per minute with HE (special) projectile: from 1,732 to 1,910
- Average damage per minute with HE (alternative) projectile: from 1,918 to 2,115
Vitality:
- Hull forehead armor: from 120 to 130
K-2 ( USSR, TT-8, prem)
Firepower:
- Dispersion from movement (max): from 0.25 (7.50) to 0.27 (8.10)
- Spread from wheel turn (max): 0.25 (6.00) to 0.27 (5.91)
- Scope spread (max): from 0.08 (1.92) to 0.14 (3.07)
- Horizon speed sight shift: from 23.99 to 21.90
Vitality:
- Durability: from 1,700 to 1,650
- Tank durability repair cost: from 8,500 to 8,250
Mobility:
- Chassis slew rate: 23.99 to 21.90
- Engine power: from 750 to 715
- Specific power: from 13.64 to 13.00
- Max. reverse speed: from 14 to 12
Observation:
- Review: 350 to 340
ShPTK-TVP 100 ( Czechoslovakia, PT-8, prem)
Firepower:
- Gun loading: from 5.75 to 5.18
- Gun rate of fire: from 10.43 to 11.59
- Spread at 100 m: from 0.32 to 0.29
- Average damage per minute : from 2607 to 2897
- Average HE shell damage per minute from 4,381 to 4,867
Stealth:
- Stealth of a stationary vehicle: from 15.45% to 16.07%
- Stealth of a stationary vehicle after a shot: from 3.06% to 3.18%
- Stealth of the car in motion: from 9.29% to 9.63%
- Stealth of the car in motion after a shot: from 1.84% to 1.91%
Source: https://www.reddit.com/r/WorldofTanks/comments/tnvja6/some_buffs_and_nerfs_to_upcoming_tanks/