Notably, the GeForce RTX 4070 Ti SUPER is now based on the AD103 die, which is the GeForce RTX 4080 cut-down, whereas previously the GeForce RTX 4070 Ti was the AD104 die. This gives the GeForce RTX 4070 Ti more options, namely core increases and notably VRAM capacity increase and memory bus width increase with bandwidth increase. We see the CUDA Cores increasing by 10%, but with that is more Tensor Cores, more RT Cores, more TMUs, and 20% more ROPs. We also find that the boost clock is the same, however the base clock gets a small increase. 
The other big part here is that the bus width increases from 192-bit to 256-bit, which allows the video card to have 16GB of VRAM now instead of 12GB. With the memory bus width increase, bandwidth increases by 33%. Incredibly, the TDP stays the same at 285W. Remember, you are getting all of this at the same $799 price point the GeForce RTX 4070 Ti was at.