There are probably a lot of differences between tennis star Serena Williams and model Kate Upton, but one of those differences was made very clear this week by both voluptuous vixens.

Williams appears on the cover of the May issue of Fitness Magazine in a curve-hugging red swimsuit. In the issue, the 32-year-old other athlete talked about how her body image views changed.

"When I was young I thought I should be built more like an athlete -- long and lean -- not with a womanly figure," she said. "But then people my age started coming up to me and saying, 'I love you because of the way you look.'"

Like that tight swimsuit, Williams revealed that she'd probably like to give her curves a hug too because she loves them.

"So I learned to be proud of my curves and embrace my large boobs," she explained. "It's all about loving who you are and realizing that you're beautiful."

Upton begs to differ when it comes to breasts, however. On Sunday, she shared a much different view on her large endowments with The Sun.

"I wish I had smaller boobs every day of my life as I love to wear spaghetti tops braless or go for the smallest bikini designs," she said. "Every single day, I'm like, 'Oh, man, it would be so much easier,' especially if people didn't constantly bring them up, but the grass is always greener!"

According to New York Post, Upton wishes for smaller breasts "at least twice a day." We can bet that Williams does not.

Williams also talked to Fitness about her distorted public image.

"It's not the real me," Williams explained. "Even for me, it's shocking to see, but in another way, it's kind of cool to know that I have everything together on the court because I don't really have my life together personally."

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Follow Scharon Harding on Twitter: @SH____4.