Personally I like MXE a lot more, because it has a psychedelicness to it than ketamine does not, and I find it much more colorful and euphoric, and best of all I remember the experience very well, whereas with ketamine I tend to forget most of it.
Also, MXE in moderate doses, where you're not trying to hole, if one of the most wonderful drugs there is. It simply has this magic that I have never seen in another drug.
One of the downsides to MXE is that the duration is substantially longer (but not really long, like 4-5 hours) and it also leaves you unable to sleep afterwards, whereas with K you can transition right into sleep. K is much more sedating.
Of all drugs, MXE is in my top 5 for sure. ketamine is definitely not.