I have both a back blade (7') and a rear snow blower. I use the back blade most often, unless it is a heavier snow fall.
The last time I used the back blade I wanted the snow pushed to one side of the road. With the blade set at an angle, the first pass was fine; however, on the second pass, which included the snow from the first pass, the blade was steering the rear end of the tractor despite tire chains. Weight on the rear wheels may make the situation better, but I don't have them.
The snow blower works great, but is somewhat of a pain going in reverse. Since I typically only need to use the blower two or three times each winter, I can deal with the inconvenience of going in reverse. I have also found that the snow blower doesn't throw snow too well if there is only a couple inches of snow. It will move the snow, but seems to throw it better when there is more snow to throw.
I mention this because I have found that there is no one implement that is best in all situations. If I could only have one implement for snow removal I guess I'd choose the blower.