Question about HP ProBook 450 G8

What is the difference between the model with Intel Iris XE Graphics and the one with Intel Iris Xe Graphics - apart from the 40 francs surcharge for the latter? The only clear difference I can make out in the technical data is the display technology: VA for the Intel Iris XE model, IPS for the Intel Iris XE model. If I'm going to use an external monitor on it anyway, I'd be better off with the cheaper model... (?)