Fab Four
Meghan Markle, Prince Harry, Prince William and Kate Middleton on the balcony of Buckingham Palace as members of the Royal Family attend events to mark the centenary of the RAF on July 10, 2018, in London. Getty Images/Chris Jackson

Prince Harry and Meghan Markle's relationship differs from Prince William and Kate Middleton's in the way the couples show their affection to each other.

According to photographer Arthur Edwards, who has photographed Prince Charles' sons over the years, there's a distinct difference between Prince William's and Prince Harry's relationships with their respective wives. The Duke and Duchess of Sussex are more physical than the Duke and Duchess of Cambridge.

"I've seen several romances in the Royal Family and I've never seen a couple more tactile than [Harry and Meghan]," the Sun photographer said on Yahoo!'s "The Royal Box" (via Daily Star). "Even when she was walking to church on Christmas Day, she was arm-in-arm with him. It's been a joy to see. He was very loved-up and is very much prepared to show it to everybody. They've not been married long but it looks like they're going to last."

Edwards also described how he views Prince William and Middleton's relationship and even compared it to Prince Harry and Markle's. According to him, the Duke of Cambridge shows the same concern for his wife, but they are not as tactile as the Duke and Duchess of Sussex.

"He did [look after Kate as much as Harry] but it wasn't as tactile – they weren't always holding hands," the photographer continued. "But Meghan is always linking Harry's arm. I don't know if it is an American thing and she comes from a showbiz life where that is very normal. And Harry is just as tactile."

Edwards is not alone in his observations. There are tons of photos of Prince Harry and Markle holding hands. In fact, when they made their first public appearance in Invictus Games 2017 in Toronto, they were holding hands.

"Meghan is used to being touchy-feely, and Harry is the same," former palace spokesperson Dickie Arbiter told People. "Harry has always been tactile."

On the other hand, veteran royal photographer Mark Steward observed the same thing. According to him, the couple "don't mind showing their emotions."

Although Prince William and Middleton are not seen in public holding hands as often as Prince Harry and Markle, former royal butler Grant Harrold said that the two couples aren't too different based on their gestures.

"People say they're not touchy feely but we've all seen pictures of Will and Kate when they hold hands and have hugs," Harrold told Express.