Should I Vote or Like ?

Now that we also have 'vote' option along with 'like' for message.

I have observed that many users are still 'liking' a message and not 'voting up' for it, though it has the requested solution.

In other forums generally we have 'like' OR 'vote', which I am member. So I was wondering

1. Any member can 'vote'.
2. Only the 'op' can vote.
3. 'vote' is not 'like'
4. 'vote' is 'like'

Also can another member mark a message as 'solution' ? This will move the message to top.

Any member can vote on Q/A posts.

I recommend voting instead of liking when you think that the post is a good answer.
Only the OP can mark a post as an answer. As an administrator I can also mark answers.

I will try to make it more clear.
When you vote on an answer you:
1. Provide good feedback to the poster.
2. Add an indicator for future readers, that are looking for an answer to a similar question, that this post will help them.

When you like a post you:
1. Provide good feedback to the poster.
2. Add an indicator that this post has some importance.

There are cases where someone wrote something funny, smart or useful in any other way but it is not exactly an answer to the question. In such cases liking it makes more sense.

Bottom line: both options are good.

If I could have, I would have voted on #3 above. I suppose I'll like it instead.