Quick takeaway
Cosori 5.8 Quart Pro II Air Fryer and Instant Pot Vortex 4 Quart Mini are very close in this matchup. When the overall score is tied, the right choice usually comes down to price, review depth, and which spec wins matter most for your use case.
Choose Cosori 5.8 Quart Pro II Air Fryer if...
Pick Cosori 5.8 Quart Pro II Air Fryer if wattage, capacity, and programs are the reasons you are shopping in this category.
Choose Instant Pot Vortex 4 Quart Mini if...
Pick Instant Pot Vortex 4 Quart Mini if temperature range are the reasons you are shopping in this category.