The core framework is POOL BILLING MODEL SWITCH. LOTTE turns pool use into a visible money cost: the source records the outdoor spa pool at KRW 12,000 per person, with seasonal operation and an adults-only summer night segment. Sirius turns pool use into a time cost: its indoor pool is broadly available year-round but has a daily break, monthly closure and last-entry clock.
30-second decision
- Summer, two adults, outdoor city-view swim matters: LOTTE can make sense if you accept the extra per-person fee.
- Winter, family trip or weather-proof pool is a hard requirement: Sirius is usually the cleaner water product.
- Late arrival: Sirius can still lose value if you miss the usable window; check the 12:00–14:00 break and evening cutoff.
- You will not swim: set pool value to zero at both hotels and compare legal room SKU, breakfast, cancellation and final total.
LOTTE charges money; Sirius charges schedule discipline
LOTTE's current pool model is easier to see in the budget: add the per-person fee to the room total, then check season and age restrictions. Sirius does not present the same admission charge in the source, but the value can disappear if your stay lands on the first Monday closure, if you return during the midday break, or if you arrive too late.
Season changes the answer
LOTTE's pool is seasonal and the current source treats November–March as closed. Sirius's indoor pool is therefore more robust for winter or bad-weather travel. In July and August, LOTTE's adults-only evening segment can be a genuine advantage for adult travelers who want a rooftop night swim, but it can be a disadvantage for families arriving late.
Do not double-count airport convenience
Both are on Doryeong-ro in the Jeju City airport-side zone. Once “near the airport” is fixed as a shared condition, it should not be counted twice as a premium. The comparison should move to pool contract, room layout, breakfast and cancellation.
Room legality comes before pool preference
If one hotel forces your group into a Family room, suite or second booking unit while the other can legally fit everyone in one SKU, that room-cost difference comes before the pool comparison. Use the same dates, all guest ages, legal room, bed layout, breakfast and cancellation first.
LOTTE City Hotel Jeju
Hotel Sirius Jeju
Verdict
Choose LOTTE when the seasonal outdoor rooftop experience is exactly what you want and the per-person fee is acceptable. Choose Sirius when an indoor pool, winter reliability or family use matters more, and you can plan around its operating clock. If nobody will swim, ignore both pool stories and buy the better room contract.