Those larges are a few mm longer, but their mediums are several more mm shorter. Again, that's just frame stack and reach. I have no idea where your pads and seat are and if your current setup is even a good one for you.
There's lot of good fitters using good fitting systems. It's better to pay one of them some money and find a bike you love and ride well. You might learn a bit about yourself too.
Retul Frame Finder has a lot of the major brands' tri bikes in a little bit more easier to read format than the ST S&R database.