Both players found the net as the Tractor Boys came back from a goal down after Daniel Ward was on target for the hosts in the first period.
"Daryl Murphy was a real physical presence and had a couple of other chances beforehand. But like all centre-forwards, he wants to score," Sky Sports News quotes McCarthy as saying.
"Murphy and David McGoldrick are a good partnership, our best partnership. Diddsy [McGoldrick] is a more technical footballer, but Murphy is more powerful, aggressive and better in the air.
"If you could put them together, you would have one hell of a player - but then they wouldn't be here."
McCarthy went on to say that 2-1 was a fair result, but admitted that his side rode their luck at times, almost falling behind early on to a James Vaughan penalty that was kept out by Ipswich keeper Dean Gerken.
"I thought it was a great result and a fair one," he added. "It was a bit touch-and-go either way. I didn't think it was a penalty in the first half - so Vaughan got his just desserts.
"But we showed a great response to their goal and we have a great spirit at the club. People care about their mates, the team and the club."
The result leaves Ipswich in ninth place in the Championship.