This is an old post, but a good one.
Like VS said, Latturula and Saint Anthony are related.....but are not the same. I have 2 SAs and 2 Latturulas. My SAs bears later in the season than Latturula. I love the bright yellow color of Latturula when they're ripe and its sweet honey flavor. It's like eating a super soft cotton ball drenched in honey! It just melts in your mouth.
However, I don't believe Latturula and Marseilles White are the same. However, I do believe they are related. Both have very distinctive rib markings on the exterior. In my climate, my Marseilles White does not turn yellow when ripe. It stays green, has a white flesh, very juicy and sweet. My best Marseille White figs came in 2009 and 2010. Man I wish every year was like those!
For those of us that live without the wasp, don't take Jon's photos of figs literal! Caprification completly changes figs inside and out. I'm not bashing Jon's site, just stating facts. This is another example of why plain ole Brown Turkey figs and California Brown Turkey figs are "the best tasting figs in the world" according to those who live in California! If you've ever tasted a caprified BT or CaBT fig, then you know what I'm talking about. They are to die for good! Jon's pictures CAN be misleading. Just remember, most of those fig pics are caprified figs.
If you don't have Latturula, then get one....You will be glad you did!