This is one of those things I go back and forth on, but at the end of the day, I don't think it's fair to compare the different eras. It's not like baseball or any other sport where you can directly compare things. Back in the day, you had to show up once a month and get people to come see you while doing the same show every night in different towns because no one knew any better. Now it's five hours a week every week all year. Bruno is fondly remembered because he was the big star back in his era. I don't think he'd be successful now, but someone Bryan's size wouldn't be allowed near a ring back then, and certainly nowhere near the top of the card if he got on the roster.
That being said, I get what you're saying on people voting for Bruno because of how revered he is. A lot of people, myself included, have done that over the years. There aren't a lot of us here that have even a working knowledge of what Bruno did in the ring, but we can easily see and study Bryan. With the Network, there's access to a lot more old stuff, but there's also access to a lot more stuff from Bryan's era.
Names like Bruno are always going to be remembered, but people like Bryan are going to overtake him in the minds of the fans because they can see him and he was more recent.