@McGentrix,
If the bottom one is a military weapon with the option of full automatic firing or "burst" firing it could be called an "assault weapon". If it's a civilian model it would be called an "assault-style" rifle because it has been made to resemble a military weapon.
Both are available in a choice of calibers and can be used with high capacity magazines.
Felt recoil would be about the same but the bottom one would be easier to control if firing from the hip because of the pistol grip.
Rather than attempting to "ban" either one I think it would be more effective to restrict the sale of high capacity magazines and institute better background checks on buyers. I could also see a 'tiered' system where older shooters with more experience would have more firearms options available to them than younger inexperienced shooters. I wouldn't be opposed to some sort of permit system either, especially for semi-autos which can accommodate high capacity magazines.
We should try to discourage spur-of-the-moment purchases made by disturbed people and unauthorized distribution of guns through straw purchases.
In a society such as ours, where vast wealth and privilege for some and chronic underemployment and poverty for others and tens of thousands of guns in circulation the idea that we're going to eliminate gun violence is unrealistic. Whether legal measures can reduce the incidence of violence is something we will need to study as those measures are put into place.
