I would also like to know if there is any differences,

I've hunted and eaten both, they taste pretty much the same to me.

at least it didnt taste like chicken

I'm glad something finally don't taste like chicken.

LOL... no kidding

I have not tried them, but I would think they are very similar.  But, heck, I think whitetail and mulie are similar too.  It's all in how you cook it.

Thanks guys. I talked to a coworker last weekend that said he definitely preferred one over the other but I can't remember which one he like more. I'll see him this weekend and ask again.

Haven't eaten Black tail in a long time but basically the same deer.

I have got to eat both and from different states and they all taste different. The best tasting one for me so far was a mullie from Idaho which came from the hells canyon area. NV and CO mullies are not to bad either, as long as the deer isn't to old.  As far as blacktail the forest deer taste bitter ( like crap ) and the low country blacktails taste very good. I'm going off strickly younger class buck deer here for taste, not the old trophy class ones that you need a chainsaw to cut.

It's a drag that those giant bucks and bulls that most of us want to get our hands on are usually by far the toughest meat you can lay your hands on. One of my buddies got an ancient bull two years ago during archery season. In addition to being so old, he was all rutted up. Needless to say, the meat was like boot leather. 

You bring up an interesting point too. I wonder if the variability you are describing between states is more a diet thing or if it actually depends on something else that varies by region. I wonder if mineral content of the soil has something to do with it.