[loramin]

Measuring ZEM is really, really hard.

Let's say zone A has a ZEM of 100%, zone B has a ZEM of 120%, and at your level it takes 900 XP to be able to measure anything (ie. see the XP % change). In both zones you kill mobs of the same exact level worth 360 XP.

(Now of course, you usually can't know the exact level of the mob you're killing, just whether it's blue or green con. That pretty much rules out any measurement whatsoever in most zones, because to measure, both zones require mobs that always have the exact same level. Otherwise, zone A might not have a better ZEM, but it might seem like it does because it has a higher average-level of mobs.)

But for the sake of argument, let's pretend both A and B have mobs with the same fixed level, and you kill 10 of them in each zone; your XP will increase like so:

A: 1, 2, 4, 6, 8, 10
B: 1, 2, 4, 6, 7, 9

Notice that both zones have the exact same number of XP increases, and the two are identical for the first six kills! Even when there is a difference, it's only a single kill apart. If you're just casually observing, the two zones would be indistinguishable.

TLDR; IF you can find two mobs in both zones of the same consistent level, and IF you kill a lot of them (more than ten, but the exact number will vary), AND you meticulously record whether each kill increased the percentage or not ... AND you're willing to do some math ... THEN you can actually meaningfully comment on a zone's ZEM.

Otherwise, you're just kidding yourself.