I don't think there's any one style that's better than any other in the mid to late stages of a tournament. It's vital to know how to adapt to the players around you, and it's vital to understand what you can and can't do at certain stack sizes.

I think a lot of people fall into the trap of trying to play one 'style' or another, but in reality your style is only a result of the individual decisions you make. You shouldn't be aiming to play a particular style, you should be looking at each spot in isolation and making the best play – everyone naturally leans towards certain patterns in their analysis of situations, and that's what make us the players we are. It's not through consciously trying to be one style or another that we develop our game.

Example – you're deep in a tournament and you have 50bb. You're on the button with 9-8 offsuit, and both blinds have 20bb stacks. A naturally aggressive player's analysis of this situation might sound something like “I think this is a good spot to steal, because the blinds aren't going to flatcall out of position, and if they 3bet or shove then we can just fold with no further thought”, whereas a naturally tight player's analysis of the situation would sound something like “well, I could steal in this spot, but it's going to look like an obvious steal, and then the blinds could shove over and I'd have to fold”. Both are equally valid opinions on the hand, but they exemplify the two players' contrasting styles.

If you focus on learning how to adapt to your stack size, the stack sizes around you and how your opponents handle them, your style will develop naturally. GL 🙂