The FP ones need to be emptied - says so right in the advertisement and these are the same as the GT350 ones, which need periodic maintenance.
The IAG gets plumbed back in.
I had a similar FP AOS on my GT350R. They install quite nicely, but hold a relatively small quantity and with the fine mesh i wouldn't bet on them not freezing or gunking up in the cold winter months - albeit the engine heat should help warm things up.
I installed the IAG on my 2026, and it...
I wouldn't say any of them at this price point are necessarily "premium', but it fits fine, works well, and looks OK. Discounts can be found if you look online. I just need it to keep wandering eyes (and hands) out of the back of the truck.