adj+一点,means compare to other things,like
中国菜和英国菜,中国菜好吃一点 chinese food is more dilicious
说英语的人多一点 more people speak english
这件衣服的颜色深了一点 this clothes color is more dark than another or others clothes
有一点+adj, means a little~
我有点累 i am a little tired
青菜有点贵 green vegetables is a little expensive
这件衣服的颜色有点深 this clothes color is a little dark