I think both cages are great for chinchillas. I personally have a QC because of portability. I had my chin in college, then moved back home, then moved to another state due to work. The cage collapses flat, making it easier to transport and that was one of the deciding factors for me.
On another note: QC also makes travel cages that also collapse/fold down. I think it's always important to have a backup cage in case of emergencies.
If you think you may get another chin, the FN may be a better choice since you have separate it into two cages.
Some petstores do have the FN142 already set-up in their store. While, they may not have the cheapest price on the FN, at least you can go there and see if you like the space,the sturdiness, how it looks, etc.
On another note: QC also makes travel cages that also collapse/fold down. I think it's always important to have a backup cage in case of emergencies.
If you think you may get another chin, the FN may be a better choice since you have separate it into two cages.
Some petstores do have the FN142 already set-up in their store. While, they may not have the cheapest price on the FN, at least you can go there and see if you like the space,the sturdiness, how it looks, etc.