What are the symptoms of prostatitis, how is it treated and how are the symptoms different from an enlarged prostate ?

Depending on the cause of prostatitis, it would be painful, with fever, and dysuria. A benign enlarged prostate is usually asymptomatic other than causing urinary obstruction when it gets too large. https://www.mayoclinic.org/diseases-conditions/prostatitis/symptoms-causes/syc-20355766#:~:text=Prostatitis%20is%20swelling%20and%20inflammation,causes%20painful%20or%20difficult%20urination.

Acute or chronic bacterial prostatitis: bacterial infection, identified by urine culture. Chronic prostatitis or chronic pelvic syndrome: there is evidence of inflammation by prostate biopsy but not due to infection. Enlarged prostate (BPH): proliferation of some components of the prostate, no inflammation. Your question involves the last 2 conditions, treatment approach is different.