Comparing an eclectus with a conure on noise and mess gives a misleading answer if you expect one bird to win both categories. The eclectus is a large, dignified parrot with a powerful voice it uses less often, attached to a diet that makes genuine daily mess. The typical pet conure is much smaller, louder for its size than almost anything else in the room, and tidier at the food bowl but chaotic everywhere else. Which reality suits you depends on whether your household tolerates sound or scrubbing less well.
Noise: occasional and booming versus frequent and shrill
An eclectus can produce a loud, harsh call, and a startled or contact-calling bird will be heard through the house, but many eclectus spend long stretches quietly eating, preening or watching. A sun or jenday conure, by contrast, greets the morning, announces visitors, answers the kettle and comments on television with a piercing call that neighbours describe before they describe anything else about the bird. Green-cheeked conures are notably quieter than the larger conures, so the species within the group matters. If you work from home on calls, or your walls are thin, the conure's frequency and pitch are the harder problem, even though the eclectus wins on raw power.
Mess at the food bowl
Here the eclectus takes the lead, and it is not close. This species thrives on generous amounts of fresh vegetables, fruit and soft foods, and it eats them enthusiastically and wastefully: pieces are dropped, flung and wiped on perches, and the area under and around the cage needs wiping daily before food spoils and attracts flies. A seed guard helps little with wet food. A conure eating formulated pellets and a smaller fresh portion still scatters hulls, crumbs and dropped pieces, and loves dunking food in its water, but the volume of perishable mess is lower and a daily sweep usually covers it. Budget your cleaning time honestly: the eclectus cage zone is a kitchen task, the conure's is a dustpan task.
Mess beyond the bowl and daily wear
Out of the cage, conures shred toys, cardboard and anything chewable with constant energy, leaving a drift of debris wherever they play, and they bathe enthusiastically in water dishes. Eclectus are generally calmer explorers, less inclined to dismantle a room, though their size makes each dropped feather, dropping and discarded toy bigger. Both produce feather dust and dander, the eclectus in larger quantity simply because there is more bird. Floors near either cage will need frequent attention, and soft furnishings nearby will collect dust. Owners who hate daily chores should notice that neither bird offers a clean week, only a choice between wet-food scrubbing and dry-debris sweeping.
Living with the reality you picked
The households that cope best are the ones that set the cage where mess is easiest to clean, keep a mat or washable surface underneath, and share the feeding, bathing and cleaning jobs instead of letting them default to the bird's favourite person. A conure's noise is managed with routine, sleep and enrichment, not discipline, and an eclectus's mess is managed with placement and prompt wiping, not by cutting back the fresh diet it needs. Choose the burden you mind least. Dividing those daily jobs with KinsLe Care Teams, where each feeding and clean is assigned and timestamped when done, keeps either bird's upkeep fair and consistent.