Judging by the latest comments from Apple co-founder Steve Wozniak, who doesn't seem to be upgrading to any of the iPhone 13s, he believes there's little difference between the latest series and previously released products.

Wozniak said he would keep his iPhone 8 for the time being
After getting the new iPhone 13, Wozniak made the following comments about the latest phone.
"I bought a new iPhone; I don't see any difference. I guess the software inside also works with older iPhones. I'm worried about being too big... But I don't study it. I only care about whether the product is good or not. ”
In many ways, the iPhone 13 series is no different from the iPhone 12, and you have to look very closely to notice that Apple has added a smaller groove to the four new models, while also making them thicker and heavier than those released last year. It's likely that he returned the latest iPhone 13 to the Apple Store because he said he was happy with his iPhone 8, saying it looked the same as the iPhone 7 and iPhone 6.
"I'd rather wait to see that movie. I'm happy with my iPhone 8, it's the same as the iPhone 7 and for me it's the same as the iPhone 6. ”
In 2017, Wozniak probably wouldn't have liked the iPhone X too much, because he told reporters that he wouldn't buy the flagship product on the first day of the iPhone X's release. Still, he praised the Apple Watch as his favorite technology product, so he didn't have that bad impression of Apple. He also mentioned that he wants to see a foldable iPhone, but given the current state of the smartphone, his dream may not be realized for the time being.
If Wozniak thinks there's no difference between the iPhone 13 and the latest model, maybe he'll be excited about the iPhone 14 series. After all, the top-of-the-line iPhone 14 Pro Max is rumored to be redesigned, equipped with a perforated front-facing camera, and massively upgraded. Hopefully, he won't be too disappointed with the results announced in 2022.