An electric car makes very good sense in the city, where the range isn't an issue, and the lack of a gearbox means a smooth drive in start-stop traffic. For highways, however, it's important you look at elevation as well as the total distance you will be driving. For your 400 km trip, you would already be at the edge of the Hyundai Creta's range, and if there are steep and long hill sections, your range will drop significantly. While you will recover some of it on the return (downhill), it won't be as much as you have expended. You would thus need a charge halt to complete the trip comfortably.
If you are ok with this, we would recommend the Hyundai Creta Electric. It has the edge over the MG on real-world range, and it's a very well finished, no-nonsense EV that goes about doing its job with great effectiveness.