Which country is better, Canada or Australia, to study abroad? (Mechanical Engineering) If you plan to immigrate after studying abroad, which country?

As your major is mechanical engineering, I suggest you go to Columbia University in Canada.

Professional setting:

Business Administration (MBA), Mathematics (Master of Science/Master of Arts), Economics (Master of Arts), Statistics (Master of Science), Electrical and Computer Engineering (Master of Engineering/Master of Applied Science), etc.

Admission time:

School starts in September every year. (MBA starts in May and September)

Admission requirements:

Full-time 4-year undergraduate, bachelor's degree, excellent GPA: b+ or above;

TOEFL: 80 or above or IELTS: 6.5 or above;

Some majors may require students to provide GMAT/GRE and work experience.

If you still want to emigrate, it depends on which city you like. Every city has its own unique characteristics, so you can't compare them. It depends on which country you have changed.

I hope my answer is helpful to you!