I was kind'a wondering the same thing. It sure looks similar with the exception of the magazine extension. Been wanting a Cheetah but they are pretty pricy. The Taurus PT58 is not exactly cheap, but it's about $100 cheaper than the Beretta.
I'd like to hear from anyone that has a PT58, or even a Cheetah. I think it would be a great gun to compliment my PT92.