WTF siberian tigers aren't clearly bigger... Their average weight is 100-150 pounds more than an african male lion, and they are evidently taller with a 3-4 foot length advantage. That being said lion males are made for fighting, and hunting so they are generally expected to be a siberian tiger more often than not. It's cousin the now extinct Caspian Tiger is considered the reason there are no tigers in Asia because they wiped out the lions.