i don’t know grinell, but i know grinnell doesn’t have engineering, only physics. the school has a 3+2 engineering program with rpi, caltech, columbia, and washington university in st. louis, but students typically end up not pursuing that route. the physics department is very, very good. hard as hell(en keller), but very good. i actually know a student from egypt in my class year. he’s super nice.
the main comparisons are:
grinnell does not have an application fee. lehigh does.
lehigh has an engineering degree program. grinnell does not.
grinnell is a smaller liberal arts college. lehigh is a mid-size university.
both schools promise to meet 100% of your demonstrated financial need, but both schools are also need-aware for international applicants.
it really comes down to how much you’re willing to spend applying to schools and what you’re wanting to study.