According to investopedia efficent market hypothesis is
The efficient market hypothesis (EMH) is an investment theory that states it is impossible to "beat the market" because stock market efficiency causes existing share prices to always incorporate and reflect all relevant information...
and random walk theory (RWT) is
Random walk is a stock market theory that states that the past movement or direction of the price of a stock or overall market cannot be used to predict its future movement..
Does both concepts convey the same message but presented as different way? Or EMH and RWT are entirely different concepts?