There are a multiple cultivars of T. spathacea. Some are listed here, but not all are shown:
http://garden.org/plants/searc...
Invasive in many humid areas:
http://www.issg.org/database/s...
http://floridata.com/Plants/Co...
Any succulent that prefers to stay moist is usually a sign of a plant that needs tons of air in the soil while moist, and that's what I've observed from all non-spiderwort Tradescantias I've had, they act like epiphytic cacti. Otherwise, the older leaves are lost too soon from letting peaty potting soil dry enough to not rot roots, or plants simply rot and die (overwatering.) Easier said than done for me, don't have the funds for the "recipe" mixes known to perform so well in this regard. I'm always wingin' it when filling pots.
Any variegated plant could revert and lose its' variegation. (Different from seasonal variation due to various light levels.) I've seen that happen on quite a few plants over the yrs, from potted house plants to landscape plants.
