Banner v Pineapple plant ID?

Hi,
I mixed up two clones I received from my caregiver and was wondering if there is a way to ID them? (Caregiver closed up shop and moved and I can't get ahold of him).
One is Pineapple and one is a Banner. The main difference, is that one has a PURPLE main stalk and stems, and the other has green stalk and stems. The leaves on the purple stemed plant are a slightly darker shade of green than the other. Both are growing outdoors, in the ground, right next to each other.
Just curious. Thanks. [attachment=o279423]