How do thet look/need help!

good morning new beginner grower a friend gave me 2 plants don’t know what they are the smaller one was about a foot high the other was about 3 foot tall not bushey the small onr is now about 3 foot and very bushey.the tall one is now about 6 foot and lots of pre flowers still not bushey.the tips of leaves have some white or yellow.small one has white specks on a good amount of leaves.how do they look? what kind are they? what are the spots and tip issue?
thanks ahead

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