The main question arises here is your need ie. You want skill or you want degree.
A degree is always a cut above on diploma.

One of the biggest differences between a degree, certificate, and Diploma is the time it takes to earn them. A degree comes in many forms and takes the longest to complete. It can be an associates, bachelors, masters, or even a doctorate. A degree can take anywhere from two to four years or longer.

Certificate programs often take months instead of years, and some can even be obtained in conjunction with a degree program. Diploma programs offer a more in-depth curriculum than a certificate, but they are more like a certificate than a degree.

Also with a good degree you have higher chances of earning more as compared with a diploma .
So if you want to do diploma then do persue it as a additional supplement to your CV with a degree program.

I hope this helps.
Regards
Madhur