Hi mam Both vaccines r ok and have its own issues DPT may give pain swelling fever incessant cry for 1-2 days cost less This side effects r minimal in DTaP but one school of thought say pertussis protection is not 100 percent But its very rarely pertussis outbreak we can see and chance is very less but costlly One advantage is you have IPV added in this You can decide any one depends on cost and saftey and for your convinience we give options to parents Vaccines once particular type and brand has been choosen -for proper immunity its better to follow same brands and type for other times too