Hey there!
Yes, what has been said is good information but there is a little more to it than just shortening the top tube a bit and changing the colors for a women’s bike. If done properly it will have not only a shorter top tube, but a longer head tube and depending on the size a different head tube angle with a different fork offset. Also the center of gravity between the wheelbase will be slightly adjusted for the intended riders body. If it is a composite bike then the layup will be a little different as well as the actual fibers themselves may be different to get a different feel out of it. If it’s a steel or an alloy frame typically the tubes are a little thinner and a little smaller in diameter to custom tune the ride.
Getting a good fitting is paramount to picking the optimal fitting bike. I would look for someone that is maybe independant and fits on a specialized fitting system like Retul, dartfish, bike fitting and the like. Your fitter will usually be able to point you in the right direction for what to get as they typically have a lot of experience of what fits not only your body but also your intended use.
Hope that helps you some 