Yes, in stocks we trade stocks of the company, while in forex, we trade currency pairs. Forex market is larger than stocks and is also more volatile.
Forex is much volatile compare to stock market , but there is a chance to bring good amount of profit.
forex is also more complex than stock market imo as there are more information you will need to considers since you are trading in pairs and not just one particle currency like in stock where you can just zone in a company.
As per my understanding, forex is mostly about currency trading, where currencies are bought and sold, while stock trading is about purchasing and selling shares of companies in the stock market.
Forex is really a complicated market , because there is no one who can predict the real faction of this market with certainly.
Imo, the concept of forex and stock are same. But the differences between them is their trading element. Forex trading means buy and sell of currency and stock trading means trading equities.