"I think Newt's a fine guy. I just think his policies are a big mistake for the United States. I think they'll take us back to the economic policies of the last administration," Biden said on NBC's "Today" show.
"But I like Newt. I think Newt's a good guy," he added.
When pressed on whether he believed Gingrich has temperament issues, Biden said, "No. Look, I don't have a dog in this fight."
The former House Speaker has come under increased scrutiny from opponents and political pundits for his perceived anger issues since rising in the national polls and winning the South Carolina primary last week.
Prior to their current roles as vice president and presidential contender, Biden and Gingrich served together in Congress. In the late 1990s, Biden — then a Delaware senator — was a ranking member of the Senate Foreign Relations Committee at the time Gingrich was Speaker of the House.
Gingrich, who appeared on NBC's "Today" show immediately following Biden, responded by telling viewers he believes there is a "mutual respect" between them.
"We used to work together on some foreign policy issues and I think there's a mutual respect there. I thought he was actually a little bit guarded, which was nice for me," Gingrich said.
However, the former House Speaker said he has no doubt that if he wins the GOP nomination, Biden's rhetoric will become "much sharper."