So I haven't gotten that far with both classes, but from the earlier dungeons getting MRD/WAR to 35 and GLA to 23 so far, I've found that tanking as a MRD is much easier for me.

I've talked to various other tanks in my FC and most of them found it odd and that tanking as a GLA should be easier. Most of them find it boring and way too easy and overall hate being a GLA and much rather be a MRD. I find it difficult and frustrating for some reason, kinda can't get a few parts of it down to hold hate as strongly as when I was a MRD working my way up to WAR. Save the "Well you just suck at it" comments if you will, I know that I do. What I'm more interested in is seeing which everyone else felt more at ease with.