It depends on the places we wear.While going to office and attending functions,I prefer Formals and during outing or visiting any theatres or shopping,I prefer Casuals.
Both are better options and one need to wear them according to the requirements or situations...But myself feel very comfortable easy going with casuals...
Formals and Casuals wears depends on Place and Occasion.If you are going to office you should put formals. If you going to picnic or parties you wear casuals.
Casual wears are very good in this regard. Some people they choice towards casual wears which gives them comfortable and ease. It depends on the taste and choice of the people who generally wear.