Is it 'Spanish Tortilla' more than an omelet?

'Tortilla' is a traditional dish from Spain which was translated into English as being an omelet and I was a little surprised because there is a big difference between them. First of all the Spanish dish have more than one ingredient while the British dish has just one ingredient. The omelet is a dish made of beaten eggs quickly cooked with oil, and sometimes folded around a filling such as cheese, vegetables or meat (often ham). The Spanish tortilla is a dish consisting of a thick egg omelet, made with potatoes, onion, and pepper and then fried in olive oil. So, the Spanish dish is more than a simple eggs omelet and people who came to visit Spain remain impressed by the Spanish tortilla. What is interesting is that, sometimes people are not very curious to eat the Spanish omelet because they are thinking that it is just an omelet but when they taste it they get surprised and really enjoy it. To my mind, the right answer of this question is that the 'Spanish Tortilla' is more delicious and better than the other one.