Keep in mind that the D model barely has any extras, who are normal for new cars these days. No parking cameras, no lane keep or adaptive cruise control, no emergency braking, if I remember correctly also no android auto or apple car play.
For me it was a no brainer to pay up more 100k and get the X model.
Own it since a bit over a year and very happy with it.
I expect the prices (both for D and X model to drop further this year because MG has announced new models to replace the MG4 and also the outdated MG ZS and MG station wagon