http://www.diffen.com/difference/Baseball_vs_Cricket
Hmmm....from all the info on the internet that could be found, since an exact study hasn't really been made, the cricket ball is comparitively heavier than a baseball, although by the time it reaches the batter, the baseball has faster momentum than the cricketball.
Baseballs have been known to break 100mph speed, while the cricket ball could achieve near that speed, but rarely breaks it.
Damage to the human body is derived from the speed and weight of the object in which this case, both can do significant damage. And in most cases where I seen the pictures of damage caused by both balls, they're pretty much equal in the damage catagory. Everything from broken hands, splintered tibia, smashed knee caps, broken noses, dislocated eyes (nasty), broken or fractured jaws, busted teeth, cracking the cranial cavity, ruptured spleens and kidneys, cracked ribs, spinal injury (at least several cases of permanant paralysis)....
The baseball and cricketball are supposed to be used in sports, but more often than not, they are used as "teaching tools", which amount to nothing more than being used as a weapon to strike an opponant. Usually used by pitchers to teach humility to the batter. Batter's do not take kindly to this form of "teaching". Nor does the team. Nor do the fans.
=^o.o^= When I'm cute I can be cute. And when I'm mean, I can be very very mean. I'm a cat. Expect me to be fickle.