Coway AIS is priced at $3,088, per the BigGo Singapore aggregator's listing of "Coway Singapore Official Store" on Shopee — the Shopee page itself didn't return readable content to automated fetching, so this figure couldn't be independently re-verified on the retailer page directly. No filter, servicing or warranty cost is published for AIS, so its five-year total ($3,088) is the purchase price alone. Coway Icon 2 and Coway Mate have no usable SG price at all: Icon 2 wasn't listed by any source checked, and Mate appeared only as an unusable range ("$588.00–$738.00") with no single standard figure. Cuckoo publishes a purchase price and an annual CUCKOO+ Care Service Package fee for all three models, giving complete five-year totals: KIUT $3,099, King Top 2 $3,649, XCEL 2 $4,349. Those totals assume the household renews the optional care package every year — it's the only source of filter-replacement cost Cuckoo publishes; skip it and there's no published way to price filter replacement at all. Among models with any complete computed total, the cheapest is Cuckoo KIUT at $3,099.

Neither brand's SG pages confirm an RO or UF classification for any model here. Coway AIS is marketed elsewhere, on Malaysia-market sources not used for this SG dataset, as "6-stage RO filtration combined with dual UV sterilisation," but that isn't confirmed on an SG source, so all three Coway models are recorded as unclassified ("other"). Cuckoo doesn't call its filtration RO or UF on any of its three product pages either — XCEL 2 brands it a "Nano Positive Filtration System"; King Top 2 and KIUT use similarly branded "Nano Positive" filter names — so all three are recorded as unclassified too. No certification with a stated tested scope is published for any of the six models. Cuckoo's XCEL 2 carries a JAKIM Halal claim (food-contact compliance, not a filtration standard), and KIUT cites bacteria-elimination testing by a Korean institute without a published scope — both recorded in notes only, not as certifications.

Coway AIS and Icon 2 are tank-based hot/cold/ambient units; AIS adds a bullet-ice maker. Coway Mate is a non-electric, mains-pressure, ambient-only dispenser. Cuckoo King Top 2 and XCEL 2 are tank-based hot/cold/ambient, marketed for larger households (4–8 people); KIUT is tankless, ambient-only, a simple one-button room-temperature dispenser.

Dimensions are largely unpublished on both sides. Coway publishes no width, depth, height or weight for any of its three models on an SG-official or SG-retailer source (Malaysia-site figures exist but are excluded under this dataset's sourcing rules). Cuckoo KIUT is the only model in this matchup with full published dimensions (135×388×364mm, 4kg); XCEL 2 publishes weight only (14.1kg); King Top 2 publishes neither. On installation fee, Coway states none for any model; Cuckoo's XCEL 2 states $0 ("FREE Delivery & Installation"), while King Top 2 and KIUT don't repeat that claim and are left unstated rather than assumed.

Both brands confirm in-house field technicians — Coway via its Heart Service page, Cuckoo via its CUCKOO+ Care specialists. Neither publishes a warranty-years figure for any model in this matchup; Cuckoo's XCEL 2 states "FREE Service & Warranty" is included with purchase but not its duration. Cuckoo is the more transparent of the two on ongoing cost: it states an explicit annual care-package price ($300–$350) for every model, where Coway states none.