You look cooler without your beard / moustache / whiskers.
You look smarter(handsomer) without moustache than with moustache。
你还是不留胡子帅.
You look better without wearing mustache.
You look much more smart without a moustache.
你还是不留胡子帅You still don't leave Hu Zishuai
You‘d better not have your moustache,it’s more handsome。
顺便提一下,楼上那位moustache拼错了,只能有mustache 和moustache 这两种拼法。