As you rightly said, the Toyota Innova HyCross is better from the rear seat, while the Tata Harrier EV is more enjoyable from the front. It's up to you to decide where your priority lies.
When it comes to performance and dynamics, the Harrier EV ticks more boxes, as it has a much stronger and more responsive powertrain, sharper steering, tighter dynamics and a pretty comfortable ride in isolation too.
However, its shortcoming is that of all EVs - the limitation of range and dependency on charging. Plus, the Harrier EV has shown signs of electronic glitches, at least on early cars.
If these are things you can work with, the Harrier EV seems like the better choice for you. The Innova, meanwhile, is the better all-rounder. It's more spacious and comfortable, with rock-solid reliability and a seamless service experience.

