Yes , DGO is a post graduation diploma degree where as MS is a post graduation master's degree. There is high value for masters and accepted in work place. Fee structure for DGO will range from 10k - 5 lakh where as for MS it will go upto 10lakh.
Masters degree has high recognition than diploma course even when learning and knowledge is same.
After graduation , masters degree for specialization is most preferred to increase career scope and job opportunities.  To get an admission into PG masters course , one have to appear NEET PG and score good to get an admission into top colleges.
Hope it helps!