Yes the course fee can differ for NRI or international students. For the diploma in Diploma in Aerospace Engineering, institutes in India quote a base fee of around INR2 to INR4 lakhs for domestic students. But the same source notes that the fee is high for NRI students.
When you plan to take a Diploma in Aerospace Engineering you will find that the fee structure depends on the institute you choose.
Most institutes quote the total course fee for domestic students at approx INR2 to INR4 lakhs for the full 3-year (6-semester) diploma. The fee covers essentials such as admission fee semester tuition fee book & library fee uniform fee and caution/security deposit.
If you also need hostel accommodation then that is extra hostel fees are typically around INR25,000 to INR40,000 per semester depending on the facilities provided. Hostel amenities often include furnished rooms with attached washrooms basic furniture utilities (fans geysers AC or fans lights) maybe refrigerator or basic kitchenware, Wi-Fi, and meal service (breakfast lunch dinner) depending on the institution.
Now about NRI or international students for them the fee is generally higher. The official fee page itself says that the diploma fee is high for NRI students. That means if you are an NRI / foreign student the institute may charge more than the standard INR2-4 lakhs. This difference arises because institutes often have different fee categories for domestic vs NRI/foreign students.
So if you are applying as an NRI or international student you should check with the specific institute for their NRI fee schedule.
Institutes treat NRI/international students differently: many Indian colleges charge higher fees for them compared to domestic students.
The fee variation also depends on what facilities are offered better labs infrastructure hostel amenities etc., may lead to higher costs.
There may be other additional costs (books uniforms caution deposit hostel meals) which vary if you are living on campus, hence overall cost becomes higher for NRI/international students.