Meghan Markle
Meghan Markle and Prince Harry will give tribute to Nelson Mandela. Pictured: Prince Harry and Markle wave as they leave Windsor Castle after their wedding to attend an evening reception at Frogmore House, hosted by the Prince of Wales on May 19, 2018, in Windsor, England. Getty Images/Steve Parsons

Prince Harry and Meghan Markle's next engagement involves a visit to an exhibit for Nelson Mandela.

The Duke and Duchess of Sussex will visit a display that marks Mandela's 100th birthday. The exhibit will trace the campaigner's career from being an activist to becoming a president. It has six separate themes that include character, comrade, leader, prisoner, negotiator and statesman, Express reported.

In 2015, Prince Harry visited the cell where Mandela spent 18 years. During the same trip, the duke toured the statesman's offices and met his widow, Graca Machel.

For their Southbank visit, Prince Harry and Markle will tour the exhibition. The couple will also see people associated with the display. The guests include Thembi Tambo, South Africa's High Commissioner to the UK and daughter of anti-apartheid politician Oliver Tambo, a close colleague of Mandela.

Prince Harry and Markle were last seen together during their visit to Ireland. However, on Saturday, Markle stepped out with sister-in-law Kate Middleton. During the said outing, she donned a striped oversize shirt and white pants. On the other hand, the Duchess of Cambridge donned a summery white dress.

Netizens immediately compared the two duchesses' outfit. Some prefer Markle while others love Middleton.

"Meghan definitely has better taste," Twitter user M.K. wrote.

"Meghan's style is more modern, simplistic, and clean compared to Kate's. I feel she has a better grasp of what suits her, so I have to agree," another user named Nina said.

"Meghan is classy, chic and she rings the changes. Kates style is more predictable, safe and less exciting," Lizzie said.

"OMG. Kate is classy. Meghan is cheap. Not a comparison. How can you compare. Kate is spotless," Lucas commented.

"I prefer Catherine's style," Karen Callahan wrote.

"Kate is waaayyyyyyy BETTER!!!" TiahMarie said.

In related news, Markle was seen with her favorite Panama hat during the said outing. However, the royal did not use it. She was photographed holding it. According to People, wearing hats from the royal box is discouraged. Thus, Prince Harry's wife couldn't use her favorite headgear.

"Protocol – dress is smart, suits/jacket and tie, etc. Ladies are asked not to wear hats, as they tend to obscure the vision of those seated behind them," Wimbledon stated on its website.