EEPROM vs Arrays

Is it better if i can make some arrays in my sketch and try to locate the data that i will store in? or is it better to write the data to eeprom and try to locate some addresses and then read some others.What is faster? What is programmaticaly correct?

If you wonder i have some data of numbers and words that i would like to store and i would like to be able to locate the word so i can read their data.So is it better with arrays or with EEPROM

What is faster?

Using arrays.

What is programmaticaly correct?

Neither.

However remember there is a limit to the number of times you can write to an EEPROM so use arrays in RAM if you don't mind the non volatility.