I put both my wondering jew and purple passion or velvet plant(gynura) is some direct sun light and neither have complained.
The yellow thing is a drinking straw for scale.
You need to have good light to have a strong purple colour in both of these plants. Don't let either of these dry out to much when they get dry about a 1/4 or a bit less of the way down the pot give them a drink. The flowers of the gynura are supposed to have a very offensive smell and it is suggested that you pinch them out as buds!
As far as having these in the garden both I believe would do well for the summer but would look pretty sad in the winter if you brought them back in as the light they were receiving would be so much less intense! Both of these plants are frost sensitive and I doubt that they would survive the winter outside!
Hope this clears up any questions that you might have! Let me know if it dosen't!
Ali