Are dual-hose portable air conditioners actually better than single-hose?

According to specialist testers and community consensus on r/AirConditioners, dual-hose units pull outside air to cool the compressor instead of pulling already-cooled room air, which makes them more efficient and helps maintain neutral room pressure. The tradeoff is higher price and slightly bulkier setup. For rooms over ~300 sq ft or in hot climates, dual-hose is generally worth the premium.