You all are missing the really important questions:
Who cares?
If I worked at wendy's, I wouldn't care how hard it was to find a job at mcdonalds because I'm working at wendys. I definitely wouldn't be sitting around the grill asking my peers if it was harder to get a job here or there. Why is that you ask? Because I want to work at wendys.
The general populace will always view dentists as second-rate doctors and med school flunkouts; you will drive yourself nuts trying to convince them otherwise. Did you know many people don't even realize that dental school is 4 years?
Who cares, anyone that is remotely close to you, or important to you in your life will know it wasn't easy and that you worked hard. You really shouldn't need any more validation than that.
It is irrelevant to debate unless you have some self-esteem issues and need to feel superior by getting into the "harder" place. Not to mention this question gets posted every month or so and it always degrades into a meaningless online bashing of two different professions.
Give me a break