I don’t know anything about early termination, but the Grandland X should give you a good idea the engines and gearboxes are the same as far as I’m aware.
What trim are you considering, do you want an automatic or manual, diesel or petrol?
If you download the brochure or look on the Vauxhall web site you’ll be able to see the power, 0-62 mph time and the mpg, you can then look at the Nissan web site and compare to the Qashqai. The Grandland has a 1.5 diesel option as does the Qashqai you already have so I can’t see there being much difference if you chose the 1.5 diesel Grandland.
As an example if you prefer an automatic then the diesel is £150 AP cheaper than the petrol for the top Ultimate trim. If you want a plug in hybrid then the AP is sky high plus you will loose some boot space.
Daughters motability car Hyundai Tucson Ultimate self charging hybrid Serenity White Moss Grey interior.
My car SEAT Ibiza SE Tec 1.2 petrol TSI 2017.