The TTD has a slight edge in armour, which doesn’t matter much against things like BM42 or the rounds it sees in uptiers. Anything with more than ~350mm pen can just shoot through the composite blocks either side of the gun and make it through comfortably. Shooting the side with the commander and gunner can hit the bustle ammo stowage as well as kill those two crew.
The TTD is heavier with a weaker engine. A stock 2A4 has better mobility than a spaded TTD.
The TTD has a 105mm with the standard 6.7s reload, in return for DM63, which looks to be better than DM23/M774/L23A1, and about on par with 120mm DM33. It’s worth noting that the Olifant Mk.2 at 9.3 also gets DM63.
The TTD has worse gun handling. It also lacks any form of MG.
There’s also the Vickers Mk.7 which makes quite a few tradeoffs in return for the L26 round. Maybe you should give these two MBTs in the UK tree a try?
1:
Leopard 2a4 has your avr 12.0 mobility with 27hp/t 1500hp engine going at 68km/h forwards & 32km/h backwards at BR 10.7.
2:
Its gun handling is 40°/s for vertical & horizontal with -9 for aiming limits aka literal 12.0 handling at 10.7.
3:
The only sub bar parts of the vehicle are its armor & firepower of which the former had its armor profile nerfed to 105mm dm23 levels and with the latter only being 50mm behind in penetration compared to its contemporaries like 3bm42, l26 & 1985-I.
So all in all it has nearly everything you could need in a vehicle to be efficient at its br range.
what the issue really is that 10.7 gets uptiered ALL THE TIME.
we dont need a better round or a lower BR.
we need a Leopard 2A4 Baulos 8 with DM33/DM43 and C-tech armour (at 11.0 ofcourse). And less upteiring because that ruins the fun. obv that means less down tiering as well.
in case someone needs to know, theres already a suggestion so you can go read it before you think about what to say: