The significant difference lies in financial aid. Undocumented students are typically ineligible for federal financial aid, but many colleges and universities offer their own institutional scholarships and financial aid to help cover tuition and fees. Some states also have specific programs to support undocumented students in accessing higher education. It is important to check each university's financial aid policies as they vary significantly.
To find colleges that might be a good fit, you should research colleges that have strong financial aid programs, and explicitly mention their commitment to supporting diverse student populations, including undocumented students. Looking at colleges with large populations of Hispanic/Latinx students might also be a good starting point, as many such institutions are proactively supportive of undocumented students.