Physiotherapists get specialisations in the areas such as paediatrics, geriatrics, neurology, cardiorespiratory, and orthopaedics. They can also obtain a doctorate degree and become involved in research.
Whereas, Diploma in Pharmacy (D. Pharma) Diploma in Pharmacy is a short-term programme for aspirants who want to foray into pharmaceutical business and pharmacy jobs. The course is ideal for students who seek short programmes in the pharmacy domain as B. Pharma and Pharma.
So, overall both the diplomas are of great scope. Both have equal importance in future and are quite competitive of each other. I would suggest you to choose the one you are genuinely interested in. If you follow your interest, you will definitely succeed.
Hope this helps.
All the Best!!