First, the distribution area is different.
Bulldog: Bulldogs are mainly distributed in Europe, America and some Asian countries.
Bug:bug are widely distributed all over the world.
Second, the size is different
Bulldog: Bulldogs are small and medium-sized dogs, and the weight of adult bulldogs is 18-22.7kg.
Pugs: Pugs are small dogs, and adult pugs weigh 6.0-9.0kg.
Third, the appearance is different.
Bulldog: Bulldog has upright ears, low eyes, white fur and many red or fawn markings.
Pug: Pug has drooping ears, big eyes and silver, apricot and black fur.
Baidu encyclopedia-bulldog
? Baidu encyclopedia-pug