What is a better choice MBA in finance or MS Finance?

There is no such thing as MBA in Finance. Universities don't grant MBA in information systems, or MBA in finance, or MBA in marketing. They grant the degree Master in Business Administration, or they offer the MS in finance, MS in accounting, etc.

Many MBA programs offer concentrations in finance, marketing, or other fields, but that amounts to only 2-3 courses in your chosen field in the second year of study. Many students avoid a concentration and take a variety of elective subjects to gain a broader background. By the time you finish the first year you'll be able to decide which concentration interests you. You don't become a specialist in a field with 2-3 courses. It generally takes a year of concentrated study. Whatever MBA concentration you select, you still earn the MBA degree, not a degree in finance, marketing, or some other field. If you want a graduate degree in a specific field, you get the MS in that field.

MBA programs prefer students with 2-5 years of work experience after your first degree. To enroll in an MBA program without work experience is usually a waste of time and money. You are less attractive as a job candidate than someone with an undergraduate business degree because they have a major in a relevant field, and you are less attractive in your undergraduate field because you have been out of it for two years and are obsolete.

Which is better for you depends on your career objective. The MBA is a general business degree training students for top level management positions up to CEO or for those with entrepreneurial objectives of starting their own business. MBA students study accounting, finance, marketing, management, statistics, economics, strategy, policy, and other courses. MBA programs accept students from any undergraduate field. They prefer students who do not have a business major because there is too much duplication between undergraduate business classes and MBA classes, and it leaves students with a narrow focus. Businesses hiring MBA graduates want students who can understand and communicate with the scientists and engineers that they have to manage. The best majors are STEM majors (Science, Technology, Engineering, Mathematics), but other majors are acceptable. Any field can use good management.

The Master of Science is a specialized degree in a particular field such as finance, chemistry, accounting, engineering, etc. training students for top level staff and research positions who prefer not to get into general management. The MS typically requires an undergraduate education in the field in which you want the MS, or a closely related field. A finance major does not get an MS in chemistry, and a biology major does not get an MS in accounting. If you want to specialize in a particular field other than business administration (MBA), such as finance, marketing, operations management, human resource management, or a non-business field such as public health, or public administration, you should get an MS degree in that specialization. MS programs typically do not require work experience.

I would say because MBA it has more value than MS finance but wat wud I know I am a high schooler after all