They're different. In myetherwallet.com, you will get to download a file and keep it securely.
-Even I already read the thread about the eth wallet I want to know/ask questions that is in my mind-
1.Can I use my Ethereum wallet to receive and widraw my money?
(I dont have any eth coins in my ether wallet so I did answers that can help me)
You can send or receive ETH (of course) in myetherwallet and other tokens i.e. in Ethereum blockchain.
2. Plus I have a waves wallet that can receive ethereum coins can. I use that as a campaign is required to send eth address not waves address?
There are coins or tokens both based on Ethereum and Waves blockchain so you get to choose one that you prefer but if the requirement is to use ETH address then you need to since the token is (obviously) in ETH blockchain and same goes for WAVES vice versa. Take note, never use an exchanger address in receiving tokens.