I had sugar gliders for about a year. Previous owner badly neglected them and fed them a terrible pellet-only diet. Kya crashed from what we believe was organ failure about 5 months in, Luna hung on for awhile but was never the same. We were in contact with a breeder and almost adopted a leucistic joey but Luna was in poor health so we opted not to risk the young joey being too much energy for her. They do absolutely need at least one other glider, Luna was terribly depressed after Kya's death.
We fed them LGRS suggie soup which I would make and freeze in batches, along with tons of variety of fresh fruit, veggies and small amounts of protein (captive bred live insects, eggs, yogurt, bee pollen, boiled plain meats, bloodworms, rarely grain free cat food for their teeth). We also offered a healthy glider pellet in the day but this is optional and you can in no way rely on pellets alone for them.
We had a special glider wheel for them, tons of toys and I taught myself to sew so I could make them pouches, hammocks etc. They appreciated foraging especially for yogurt drops and mealworms. I took Luna with me everywhere in pouches, she would usually sleep the day away. Kya crabbed whenever the pouch moved so she did not often go out with me. Both were grumpy old ladies but both were learning to explore us with the help of treats. They require a ton of time, maybe 3-4 hours a day if not more to keep them truly bonded, and it has to be on their terms which usually means at night.
They do tend to pee on everything. My weekly ritual was to strip the cage, wash all fleece in the laundry, was all toys in the sink with plain dawn dish soap, then bring the cage itself into my shower and scrub all of it down with dawn. This kept the smell to a minimum...I do basically the same now with my ferrets although they smell less as they are litter box trained.
From my experience my amazon is far less work than sugar gliders. Be realistic about the time you have and whether you can provide for their them as their size can be deceiving - they are a true exotic and need very specialized care. You also will need to get a tent or "glider proof" room - much more difficult than ferret- or bird-proofing as they are tiny and can climb and glide. We used a walk in closet as their room which also let us artificially control their "active time" using a UVB bulb.