Here is the my alternanthera reineckii variegated I got from TEXAS. His was grown outdoors. He indicated they were originally from Manini The growth was green with pink veins and a pinkish stem with white flowers at leaf nodes.
The new growth has been a nice red with pinkish veins like wabisabi's. This is under a Finnex Fugeray.
Now this is one of those same stems in my emersed setup. The new growth is even redder than my submerged stems, the leaves are developing a 'crinkle' like manini's and they are growing very compact and leaves are pointing almost straight up. This is under a 24watt T5HO 6500k bulb, but very close to the plant.
Based on this, maybe the different growth patterns are probably a result of light intensity, and not the result of one being true and one not?