IMO Magnolia is just a improved version of brown turkey fig. I have Brown turkey, Texas blue giant and 200 magnolia fig trees. If I was to rate them I would give brown turkey a 6/10(watery melon flavored). Texas blue giant(7/10)(30% bigger than brown turkey slightly better melon flavor).
Magnolia is about the same size as Texas blue giant but rounder, flavor has been variable, anything from watery melon(6/10), to rich, sweet, dark plum flavored(8/10). The color of the outside when ripe can be brown, red, purple or even black. It can have a large hollow center, or sometimes it's solid. Internal color can be amber, pink, or red. The best ones/(first ones I ever tasted) I had ripened during 2 weeks of continuous rainfall during February, 2015. They were dark black, with a solid red center, taste was almost identical to dark plums, and of course I propagated as many as I could after that. But the next crop I got that riped in July, with hotter dryer conditions, tasted just like a normal brown turkey fig, with a watery melon flavor. Still trying to figure out what this figs deal Is... So far it's given me more headaches than delicious figs.