a like is when you like, a rep is when you rep. they show up differently, one is more public... the other not so much.
edit; faster to like, if you rep, usually it was really good cus it takes extra time lol.
rep is suppose to be if people help you and they give some good advise to help you with your plants and/or information...just click on sheriff badge on bottom left of persons post(beside journal this post ), you can add a reply to the add rep, if you like...best to say who its from too! cuz it will not say who its from if left blank!
like is just like what they said if funny or whatever you like...haha