Different Hemis?
 

I've been a Mopar guy for a long time. But I've been into the old Mopar engines like first and second gen Hemis, 440+6, Max Wedges, etc and i don't really know that much about the modern day Hemi motors. I know the basics of them like the 16 spark plugs and stuff, but my question is is there a different between the hemis they put in different cars? like is the 5.7 Hemi in a jeep, the same as a 5.7 Hemi in a charger or challenger? and stuff like that. Or is a 5.7, 6.1 or 6.4 Hemi the same engine in all cars and trucks. If there is a difference, what is it?