Since you are open to buying a pre-owned car and have a very low running, we would recommend you go ahead with this option. The two used SUVs you have selected are essentially the same, both the Grand Vitara and the Toyota Urban Cruiser Hyryder are technically identical, and so our suggestion would be to buy the one that has lower running, and is in an overall better condition. Also, do not bother paying a higher price for the strong hybrid option, again given that your running is very low.
Given that the Maruti Suzuki Grand Vitara and Hyryder are relatively new, you may not find plenty of used options; thus, you could also look at a Hyundai Creta, examples of which you will find aplenty. The 1.5 litre petrol with the CVT auto gearbox would be a good fit for you.