No, this isn't a variegated form. I bought this some time ago, maybe some 5 - 6 months ago and put it out in the garden until I decided on a place for it to go permanently. A few months later I came across it again and a lot of the leaves were 'bleached out'. Obviously from the sun. I thought they'd be okay in full sun, but probably it'd been sheltered in a nursery all its life until I bought it.
I moved it into shade where there's only very light filtered sun. The leaves in the centre seem okay, possibly grew sun hardened while the older leaves were being burned.