The Obj 140 gameplay was recorded yesterday, July 14th, but I was unable to upload it until now.
First thing's first, the Obj 140's gun does not have the handling, or RoF of its older brother, the T-62A. That does not mean in any way shape or form that the 140 is a worse tank. The gun handling is only worse by the slimmest of margins in every area besides the RoF, where in many people's opinions the gun should get a slight buff.
With regards to maneuverability, the Obj 140 is faster, but accelerates slower due to worse terrain resistance. The 140 will beat a T-62A to key positions at the start of a battle, and it will run down the last enemies more efficiently. The difference in the hull and turret traverse (I believe 4 for the hull, and 8 for the turret) means that you are slower to get your gun on targets of opportunity if they are a complete 180 degrees from your original point of aim.
As far as the armor is concerned, the 140's hull armor is superior to the 62's because of the great sloping. The turret armor of the 140 IS worse than the 62's, and it has more weak spots, but that doesn't mean it has a weak turret. Weak relative to one of the strongest turrets in the game (if not the strongest) is nothing to be ashamed of. It still has a strong Russian turret, that allowed myself to snag a steel wall in my second match ever in the 140, while getting shot at by another 140, a 50M, and a Patton. The turret is weakER, but not WEAK.
As far as flexibility is concerned, it is another area that the 140 wins. The extra degree of gun depression works wonders when you're on the hill on mines, shooting down on the enemies, you can change flanks more quickly and you will get to strong positions before the 62.