I can see that  you are a newbie as I. As a newbie I think we should learn more and more. If we read forum post regularly and try to googling regularly then we can learn enough.
Anyway I came across to your questions: From my little study and knowledge I can assure you that  No, ERC20 & ETH  are not same. ERC20 is a platform that supports ethereum based Tokens, while ETH is the short for ethereum and ethereum is a token..

hope it will be helpful to your kind assistance.
If you have further query then feel free to post here.

Thanks