Here is something to review.
The next photos are of Floratam and Palmetto. Floratam for what it is worth, gets a bad rap in my opinion and people want something different even though it does well overall in our environment.....however Palmetto which matches up with it on the color scale despite what IFAS says and can not be told apart from floratam once established....is MORE cold tolerant as evidenced by IFAS literature as well as can be seen in the following photos. We had a discussion on which SA cultivator we use and why.....I said Palmetto cause of the recent cold snaps we have over the last few years and how it blends well with Floratam...here you go.
The first photo is Floratam on the Left, Palmetto on the right side of the lawn - which held up better against the frost?
The second photo is same with Floratam being the furthest from your viewing angle.
Third photo is a close up of the Floratam and the last photo is a close up of the Palmetto. All these photos taken from the same lawn in the same location (front lawn full southern exposure) .