I only have the Dream Enchantress so I can't compare the two. That being said, I can give you some info on the DE. I was mainly attracted to its dreamy watercolor artwork, which is beautiful. There are only four or so adult men in the cards, so this is a VERY female-centric deck. Also, lots and lots of female nudity. It's more 'innocent' nudity as opposed to 'erotic' nudity, but I still would keep this away from more conservative querents. The cards have no words on them, so they're good if you dislike the standard LS multilingual borders. There are quite a few cards that deviate drastically from the RWS symbolism, and the LWB is of little help with these. Overall, I find this deck to be rather difficult to read with for this reason. If you're someone who can read completely intuitively then this may work better for you. If not, be prepared to spend a good amount of time studying this deck before you'll be able to comfortably read with it.
Looking at images of the Secret Tarot, it seems like a more traditional deck. If you like the artwork of both of them, I'd suggest deciding based how you intend to use the deck. Readings for yourself and others: Secret. Meditation and study with some personal readings: Dream Enchantress. Hope this helps!