Never hunted blacktails yet. Been meaning too. Since we have sitkas, columbians, muleys and whitetails in this province, I'm sure one day I'll try for the BC Deer Slam. I have a buddy who is a diehard blacktail nut and he has taken several really respectable muleys too (one that nets 215 NT. He is of the opinion that hunting big coastal blackies is tougher than hunting big muleys. But like other's have said, it is all a matter of terrain. I hunt big muleys in country that is just as thick as the Coast and I think they are pretty damn hard to kill in that kind of terrain. Trophy whitetails are the same.
Can't really say that when you get into trophy class animals there is a real easy species out there. Hell, black bears are pretty damn easy to hunt, but when you are pursueing the big buggers (7 foot or bigger) most are dam tough to kill. You only see just a glimpse of them not unlike big trophy mule deer.
Hell if trophy hunting was easy everyone and their dog would be doing it.
BTW Bandit, You probably will think I'm an A$$ too. I can kill 3 muleys a year here in BC. All over the counter tags too. LOL!