The offering is different depending on the sectors, not the aircraft: e.g.
I recently flew LHR-DXB-BKK. On the LHR sector, I was offered time based plans (5 USD for an hour, 10 USD for three, 15 USD for unlimited throughout the flight. I then flew DXB-BKK on exactly the same aircraft a few hours later and the offer was 5 USD for 10mb (on mobile - although you get different offers if you use a laptop) or 15 USD for 50mb.