US Undergradute to US Graduate vs International to US Graduate

I am currently an international senior. I would like to know whether there is any difference in the admission selection percentage between :

Studying Undergraduate in the US and going for Graduation in the US
and
Studying Undergraduate Elsewhere (International) and going for Graduation in the US

It depend on financials. If you can afford to study undergrad in the US, I would say go for it.

@TheDidactic Exactly, it will be a bit hard but payable. So, is it worth it ?

Also, is Transfer and Graduate studies are different right?

Depends a lot on the field of study and the universities in question. For medical school? if you want to go to med school in the US, undergraduate in the US or Canada is nearly essential. For physics? it will be depend to some extent on the international status of your undergrad and a lot on your Physics GRE & General GRE scores. For an MBA or Law? what you have done since university, plus your GPA and your test scores, will matter more than what country you did your undergrad in.

There is probably a difference in percentage- but it may not be a meaningful difference. Graduate school admissions- esp at the Doctoral level, notably less so for terminal/taught Masters- are more about your subject than anything else, and there tends to be a fair amount of awareness of what is going on internationally.

Also, transfer usually refers to transferring between undergraduate universities, as opposed to the ‘transfer’ from Masters to Doctoral candidate.

I can’t tell you how to make a financial decision. But what I can tell you is that it will be easier to study in the US and acclimate yourself to the culture, customs, and language, and make contacts with faculty etc. in the states before going on to graduate school. Do you plan on living/working in the US or abroad?

Transfer and Graduate are different, yes. Transfer is going from undergrad uni to undergrad uni while graduate is pursuing a masters/doctoral after bachelor (4 years)

Assuming you’re talking PHD, not med school (where it’s a pre-req), it’s possible and you have very limited choices - students from little known colleges can be trusted and investigated, whereas international colleges that aren’t internationally famous will make things much harder for you. The path US undergrad-> US graduate tends to be easier also because many international universities offer little, if any, chance at knowing a professor (ie, at a meaningful letter of rec) and at doing research (essential in the US). Resources tend to be less open and plentiful and opportunities tend to be fewer, so that even a top-ranked international university may not have provided the student with similar options as those offered at an honors college. In short, attending a lesser known American college will be to your benefit compared to attending a top tier but not brand name university in your country.
The exception is if you intend to study a less-studied aspect of your culture in an American department (postcolonial studies as they apply to francophone Africa or women’s studies as they apply to India or Gulf countries, for instance), then there’ll be no difference if you majored both in your country’s culture/history/literature and in English/American studies/general history. In addition, attending a TOP 3 Economics/Business program in your country + working about 3-5 years gives you excellent odds at top MBAs.
Overall, I would say that if you have the means or can earn a merit scholarship, it’s worth it and less risky.

Transferring means changing universities in the middle of your undergraduate years.
Graduate studies take place after you finished your undergraduate degree and require additional tests.

Thank you all so much for answering. I have 1 more question, does Graduate refer to PHD or Masters ?

Either- really, any course for which having completed an undergraduate degree is a pre-requisite.

In most fields of study, faculty at international universities do have professional contacts in the US, and can advise their students. Completing your undergrad degree in your home country does not automatically make it more difficult to get into grad school in the US.