Nexus 7 for reading comparedto iPad?

Has anyone used an iPad 3 and a Nexus 7 extensively for *reading*?

I currently own an Atrix running (a very buggy port of) Jelly Bean and an iPad 3, which is used for hours every day for learning/reading. I can't help but feel that the smaller, lighter Nexus 7 would be better suited for the task (and I hate my kindle) but I can't even find a display model of the device to compare :(. The screen is without doubt the most important feature for me, and I really don't want to take a £200 leap of faith, so any input by people who have used both devices would be strongly appreciated. Thanks!