Mitsubishi Galant 16V or V6 ?

Hello dear community, I’ve been thinking about getting a Mitsubishi Galant (preferably advance) for some time now. Now I wanted to ask what engine you would rate me, 16V or V6 ? I’m talking about the following points: reliability, sound, possible (children) diseases that can occur and consumption (difference yes/no ?). Then I also wanted to ask what the difference between GDI and GLS is, have already read that you should leave your hands on the GDI better. W he looks there at the GLS ? Thanks already in advance