It depends on your career planning. If you are willing to pursue engineering, then a regular diploma with an above-average percentage would be a great option to go for. The estimated tuition charges would be on a lower end as well as it is a regular diploma. If your aim is to land a job as soon as your diploma is completed then it is suggested to opt for NTTF.
In a regular diploma course, there would be a little struggle in the beginning as the colleges do not provide any immediate placements or training programs. If you look into the future then this is a wise choice rather than the specially designed courses.