It may be safe to say which hammock is better boils down to your hiking prefereces. The Deep Jungle's double bottom allows for insulation between the layers. It is VERY convenient and more comfortable for some people than sleeping directly on a pad such as one made from Reflectix. The second layer of fabric does add weight. Many who backpacking with a hammock are going for the lightest solution thay can achieve. Some will even go with a slightly small hammock to save weight and bulk. Those who hike small mileage days may be willing to accept the extra weight for extra comfort.
You may want to check to see if Tom has made modifications to the Supershelter yet for a side-zip version. He has mentioned working on one. The original Supershelter was designed specifically for the bottom-entry, but I've been told that they can work with the side-zips. Some of the newer Backpacker Asym side-zips have the rings sewn in to accommodate the Reflectix pads' attachment lines. If the Explorers haven't been fitted with them, they are not hard to add. I sewed some inside a Hyperlight.
Agian, as with other concerns, what works best for you comes under HYOH.
Hennessy Hammock afficionado and supporter.