Here's a general comparison:
* Great Dane: Males can weigh 175-200 pounds, females 110-175 pounds.
* Bullmastiff: Males can weigh 110-130 pounds, females 100-120 pounds.
However, it's important to note:
* Individual Variation: There is a lot of variation within breeds, so individual dogs can be larger or smaller than the average.
* Diet and Exercise: A dog's weight can also be influenced by diet and exercise levels.