Wells' purchase prices run $780 (Mini, ambient-only) to $2,080 (Slim One); among its hot/cold/ambient models, Slim One is $2,080 and True Tankless Cooling+ is $1,880. Happie's two models are $2,488 (Joy) and $4,088 (Miracle). Both brands' totals are purchase price only, because a filter without both a price and a replacement interval is excluded from the five-year total: Wells publishes neither for any model; Happie publishes a bundle price ($240 for Joy, $260 for Miracle) but no interval for either, so both are marked incomplete and the filter line is dropped from the total. On published purchase price alone, Wells is cheaper across every comparable hot/cold/ambient model. Separately, Wells' own structured pricing data marks its figures as excluding GST; Happie's pages carry no GST disclosure either way.

Neither brand names its filtration technology as RO, UF, carbon or ceramic on its own product pages. Wells describes "Carbon and Neo Nano Clean" filters; Happie describes a "STEALTH Electrolysis Technology" sterilisation layer. Both are recorded as unclassified rather than mapped onto the nearest-sounding category. No certification with a stated tested scope is published for any of the five models; Happie's Miracle carries a "Singapore Good Design 2025" award, which is a product-design recognition, not a water-filtration certification.

All five models are tankless. Wells Mini is a passive, non-electric, ambient-only dispenser. Wells Slim One publishes eight temperature presets, and True Tankless Cooling+ publishes seven, including a 10°C cold and an 8°C "super cool" setting. Happie Joy publishes hot 45/75/85°C, ambient 27°C and ice-cold to 4°C; Miracle publishes hot 45/75/85°C, ambient 25°C and cold 4/6°C — comparable temperature detail to Wells' hot/ cold models on both sides.

Happie markets the Miracle as the "world's slimmest water purifier", but its stated dimensions — 5.5 × 12.5 × 24.5 cm, roughly the size of a filter cartridge — fail basic plausibility for a hot-and-cold dispenser and are treated here as unpublished pending clarification from the brand. That leaves Wells Mini, at 90×301×313mm, the smallest verified footprint in this comparison. Happie Joy (160×510×410mm) is close in width to Wells Slim One (160×450×360mm) but deeper and taller. None of the five models, on either side, publishes an installation fee.

Neither brand publishes a warranty-years figure for any of these five models. Neither states its service model, in-house or contracted, either — though Happie is the Singapore-registered entity here (Happie SG Pte Ltd, per its own site), while Wells' SG site doesn't publish a registered company name at all — it identifies itself only as "Wells Singapore." On origin, Wells states plainly that it's a Korean brand established in 2002 with products "designed and manufactured in Korea"; Happie's own site describes itself only as a "homegrown" Singapore brand and doesn't state where its products are designed or made. Buyers who want a warranty term or servicing cost in writing from either brand need a direct sales enquiry — nothing here is published.