Much like Princess Diana, the pair are much more hands on with the general public.
One action in particular sets them apart from the older generation.
Meghan and Kate both get down on their knees while addressing children, and are happy to give out hugs, something the Queen would never too, Grant Harrold said.
The royal butler who has served in the role for HRH Prince Charles, the Duchess of Cornwall, the Duke of Cambridge and Prince Harry exclusively told Epxpress.co.uk: “(The younger generation of royals) do things we all recognise, especially when it’s kids – they go down to their level, they interact with them.
“The older generation of royals don’t tend to do that – the Queen doesn’t go down to them.”
The move imitates the friendly nature of the late Princess Diana, Harry and William’s mother, who was the first royal to be so hands on with members of the public.
Grant, who has made the comparison between Meghan and Diana on his Twitter account, pointed to the hug between Meghan and a school girl in Birmingham after Harry introduced the pair.
The Prince led the little girl over to Meghan after her heard she wanted to be an actress.
He said: “With Prince Harry and Meghan I think they that that further.
“Can you imagine the older generation of royals meeting someone who wanted do whatever job and they said ‘oh you’ve got to come over and meet the other royal’?”
He added: “As soon as I saw that hug I went on Twitter and put a picture of Princess Diana up.
“At the end of the day, Princess Diana was seen as a very modern royal.
“She did things her way and that’s kind of what the younger royals are doing – they are modernising and the younger generation and people love them.”
Making a note of Kate Middleton and the Duke of Cambridge, Grant pointed to the sophisticated way in which the couple deal with the public.
He said: “It’s completely changed. Prince William and Kate Middleton, they have a very modern approach but they do it in a very classy way.”
Grant recently explained to Express.co.uk why Meghan and Harry hold hands but Kate Middleton and William don’t.
The stunning LA-born TV actress and the fifth-in-line to the British throne are very modern in their attitude to public displays of affection.
The couple are often seen holding hands, putting their arms around one another or holding one another close as they walk.
Meghan is similarly touchy-feeling with the public, closely hugging a number of Britons in a very intimate move for someone associated with the Royal Family.
The images seem in stark contrast to those of Kate Middleton, 36, and Prince William, 35, on their public trips.