Realistic, Strv 122B+. 12.0 > 12.3. The Strv 122B+ is one of the most dominant vehicles at top-tier and far outclasses other MBTs at the same BR, like the 2A5 and Strv 122A. Notably, its far better armour. There should be further separation of the best top-tier MBTs from the others.
Same reasons as for 2A7V, 2A7HU and T-90M for which separate comments exist.
Hunter F.1 9.0 → 8.7 its just worse than everything at 9.0 these days CL-13B Mk.6 is better than it in prettty much every catagory and especially with the F3H-2 going down it should go down too, its days of being the best jet in game are long over
AB+RB, C13 T90, 7.0 > 6.7.
it has the exact same turret as the AUBL/74 which sits at 6.3/6.7, same gun, same reload, same everything turret wise, it just has a different hull which is either the same value or worse (much lower top speed on flat/urban maps), yet it sits 1/2 BRs higher than its counterpart. It feels completely logical to move it to the same BR or atleast roughly the same BR as the AUBL as there is nothing that makes the C13 version any stronger.
Realistic, T-90M. 12.0 > 12.3. The T-90M is one of the most dominant vehicles at top-tier and far outclasses other MBTs at the same BR, like the Leopard 2A5 or T-80BVM. Notably, its far better armour, including spall liners. There should be further separation of the best top-tier MBTs from the others.
Same reasons as for 2A7V, 2A7HU and Strv 122B+ for which separate comments exist.
Challenger 3 should get at least a reload buff so its on par with abrams and merkava that have similar internal loadout but both have spall liners and good mobility unlike the nerfed CR3
Hunter F.6 (UK) 9.7 → 9.3/9.0 this thing is a joke at 9.7 and is miserable, 9.3 should be its BR if not 9.0 the SRAAM is a meme missile, its not nice to use in any respect honestly would take 2x AIM-9B over 4x SRAAM
We dig through topic, like previously. But with new rule (one comment, one vehicle) it will be much easier.
It will be also easier for other players to support your suggestion.