Either is fine with me.
Button or plunge lock-based folders are fewer compared to linerlocks and while they are simple and fast to operate, button locks require some time to break in for smoother opening and don't take kindly to wrist-flicking the blade out and are more sensitive to dust and lint buildup.
Linerlocks are IMO easier to maintain, and one-handed opening/closing is pretty fast though I have to be careful to keep my fingers away from the handle when closing the blade.
Both locks if properly made and used, maintained properly can work pretty fine for light work and EDC IMO.