Hi Aman,

It depends on your preference only. Small screen size will reduce weight and the laptop will be more handy and reliable. This type of laptop can be carried anywhere with ease. Now, when it comes to big screen size, the laptop would be somewhere heavier and it will not be easy to carry. But, it will offer more immersive and larger screen, that will improve your screen interaction experience. If you want my suggestion, then I would prefer the 13'' one.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!