I'd go with the Ferret Nation, personally.
the other one has too much plastic in it!
You should also remove
all the ramps from either cage. Chinchillas don't need ramps, they just JUMP.
You can buy wooden ledges to replace the plastic ones if you go with the 1st cage.
If you go with the ferret nation, you will either need to remove or cover the plastic trays.
I have the FN cage, and I removed the center separater...installed a bunch of wooden ledges...and I cover the bottom tray with fleece blankets as bedding. That works well for me. You'll have to decide what works best for you!
See!
(The smaller cage to the side is a TEMP cage. I don't use it often or for long...just waiting a few weeks until the 2 can be together. Since this photo I have removed the plastic ledges in the smaller cage & replaced them with wood ones because she was chewing the plastic. Luckily she hasn't tried to chew the wheel yet, hopefully she can be moved into his cage before she attempts that! hehe).