Hi Scott, yes they are different. I have both of them and they'll grow differently depending on the environment but my Spiralis red is a light red colour with a green vein, almost looks like a candy. The spiralis red can also display a veined pattern so it's a fair enough confusion.
My Spiralis Tiger is darker, like a wine red but with very clear distinct stripes on the leaves. It's much smaller (although can also grow large) and it grows slower for me too.
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1st photo: Spiralis Red
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2nd Photo: Far left plant is Spiralis Tiger