The Romans used to pitt creatures against eachother all of the time. I am not sure about the Lion and the bull but I would back the lion too...(lion would definately have it if the bull wanted to run, some lions have been known to take elephants and giraffes)
The old favourite used to be lion vs bear. The bear would always win as it would crush the lions skull with his paws.
Lion vs tiger the tiger always wins butt it has better balance (can stay on his rear legs for far longer than a lion)
I love animals though, and I am glad that most of the cruelty is a thing of the past.
As for the coin, bravo!