It seems pretty clear cut. In the first interview, Rudy was asked explicitly about Joe Biden and foreign policy experience and he suggested very directly that Biden didn't have any, summarizing Biden's record thusly:

"It's one thing to speak about what you want or even pass laws about it. It's another thing to actually do it. Foreign policy experience to me means being an ambassador, being in the state department."

Unless I'm missing something, Rudy explicitly used the words "foreign policy experience." But then Rudy was later confronted about his contention that Biden Senate Foreign Relations Committee chair Biden lacks said experience. And he responded that he hadn't attacked Biden this way at all. "I didn't mention foreign policy." Rudy said. Of course, Rudy did in fact "mention foreign policy."

Wolf Blitzer did fact-check Rudy here, but he also kind of laughed off Rudy's mendacity — yet another reminder that many in the media elite still see Rudy as someone who hit the political jackpot on 9/11 but who is fundamentally unthreatening and is a kind of harmless buffoon.