The Toyota Innova HyCross is the ideal pick for you. Its large size not only lends it great road presence but also gives a very spacious interior. There's genuinely usable space in the third row, and luggage space is decent with all rows up. Also, you can fold the third row to make more room, and second row comfort is very impressive. 

Versions with captain's chairs in the middle row go the distance with powered seat adjust and adjustable legrests. We'd recommend you opt for the strong hybrid in ZX(O) trim that gets you good economy and all the features. 

 

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. 

With your extensive usage, we cannot recommend an EV, as you would have to charge it frequently, and that is not good for battery health. In your budget of Rs 25 lakh, there aren't any 6-seater hybrids, either; your only option there is to move up to the Rs 30-lakh-plus Toyota Innova Hycross or Maruti Suzuki Invicto - both of which are excellent choices. 

In your budget, the best option is the Kia Carens Clavis diesel. It's well equipped, comfortable and surprisingly spacious for its size. Plus, there are both six and seven-seat versions, so you can choose which configuration suits you best.

Both the Mahindra XUV700 AX7L and the Toyota Innova Hycross GX(O) are good SUVs, but quite different in character. 

The AXL variant of XUV700 is feature-rich and a performance-oriented SUV with strong petrol and diesel engines. 
The Innova Hycross GX(O) is the top-of-the-line non-hybrid or petrol-only variant, which is a practical and reliable option but lacks the tech and the wow-factor of the XUV700. 
Both SUVs are spacious, but the Hycross is also more comfortable than the XUV700 with a smoother ride and more room in all three rows. 
However, we feel for your annual running of only 10k a year, which is mainly on the highway, the diesel XUV AXL will be the best option as it offers strong performance, effortless cruising and despite being a diesel is quite refined. Plus, the AXL comes with ADAS features, which can be a lifesaver in high-speed situations on the highway.
You should wait for the Mahindra XUV 7X0, which is the updated XUV700 with extra features like a third screen front passenger, to be launched in early January 2026, before making your decision.