I just went by and visited Chris, the guy that makes Spiderwebs today. Ended up leaving with a full spiderweb cage. I have not had a chance to put the spiderweb on, but I do also have the Mopar deck cover, and it would absolutely work fine with it
My jeep is a soft top, and with the doors and windows removed, the top is basically a safari top. I have used that configuration plenty of times over the years. I opted to get a spiderweb because I liked the "openness" of the spiderweb, giving me shade, while still allowing more airflow than the soft top. You can also see through the spiderweb, so you dont feel as closed in.
Chris had his jeep parked on the the lot, in full Florida sun, and his dark charcoal vinyl seats were not at all hot to the touch. However, the sides of the seat, where the sun was hitting them were scorching! And after standing next to the jeep, and climbing in under the spiderweb, it was definitely cooler. So the spiderweb does what it is supposed to do as far as providing relief from sun.
I think the ideal solution would be to have a soft top, as well as a spiderweb. That way you can run the spiderweb to keep the sun at bay, and just flip the soft top up when its going to rain. ..If all you have is a hard top, and it is a one or the other option, then the safari top is probably going to be a safer bet. You will compromise some of the benefits of the spiderweb, in return for some rain protection.
tops are like sneakers, you just grow in to a favorite pair. Over the 13 years I have had my Jeep, I have collected all kinds of covers. The deck cover has been used maybe 3 cumulative months (in 13 years!). The wind screen has been used about 5 days, the bikini maybe 10 days. For me, the most versatile, and easiest to use is the soft top which is always attached to the jeep. I also just picked up the BestTop trail cover so I dont have to worry about not having window and doors when parking in a lot (like at the airport when I go off to work), and Florida storms are looming. Im hoping that pairs nicely with the spiderweb.