I have the Suncoast HQ Lrg Sturdy which is the equivalent of the Congo. The differences are between those two is the Lrg. Sturdy has six smaller, slide up doors (I usually refer to as windows) on the front panel that needs to be zip tied. The zip ties are provided by Suncoast, along with two for the two little side panel doors that I believe are also on the Congo (which needs to be zip tied). The other difference is the Congo comes with shelves, ladders, and wood perches that the Lrg. Sturdy does not. This is not an issue with most people, but I do like to add a shelf or usually two, but have no use for the ladders (they aren't the safest and are not needed I've read). The Suncoast HQ Lrg. Sturdy may have come with the wooden perches and feeding dishes, but I never used the perches and am not sure I even have them still. I have replaced the 6 front window zip ties with removable zip ties, so I can take them off and put in a feeding dish now and then, but I use it for a toy bin, not food. I ended up purchasing two shelves from EN to fit into the cage and I usually use both, I like offering a couple of levels to setup feeding and play areas and it helps the gliders utilize more of the cage imo.
Now, I have read about the CN, and it's been very popular, hopefully someone that has one can give you their review on it. I also like the doors on it for cleaning, although I find the Congo doors are large enough to fit everything I need to place inside the cage as well as no problem cleaning it, the CN would be even easier. One of my issues with the cage was I prefer the vertical bars due to my preference of using a water silo. I sometimes feel that horizontal bars limit what you can attach to the cage walls. The drop pan was an issue I had as well, but have read there are modifications for that.