Both John Legend and Tom Brady were already famous when they became parents, but their experiences of raising kids in the spotlight aren’t as similar as one would think. The stars discussed fatherhood on the most recent episode of the NFL alum’s “Let’s Go!” podcast. The singer, 45, noted his and Chrissy Teigen’s eldest two tots — daughter Luna, 7, and son Miles, 5 — “seem to take it pretty well” when it comes to having well known parents. “They take it in stride. They’re used to it now. They know that their mom and dad are famous. They know, you know, their friends see their mom and dad on tel…