The decision in plain terms
Choose PRO 4qt Slim Air Fryer if you want the smaller advertised capacity. Choose PRO SmartCrisp 8qt Air Fryer if the larger advertised capacity fits your batch plan.
The key documented difference is advertised capacity. That difference does not establish a proportionate change in usable cooking area, portions or cooking speed. There is no hands-on performance winner or live-price winner in this comparison.
The documented differences
| Specification | PRO 4qt Slim Air Fryer Number not verified · US | PRO SmartCrisp 8qt Air Fryer Number not verified · US |
|---|---|---|
| Total capacity (qt) | 4 | 8 |
| Layout | single | single |
| Baskets | 1 | 1 |
| Exterior size | 8.22 W × 14.37 D × 11.37 H in | 12.95 W × 16.25 D × 12.83 H in |
| Rated power (W) | 1300 | 1700 |
| Cleaning | Product page says the removable basket and crisping tray are dishwasher-safe; the linked manual gives only hand-wash instructions. | Product page says the removable basket and crisping tray are dishwasher-safe; the linked manual gives only hand-wash instructions. |
| Documented modes | Air Fry, Bake, Roast, Broil, Reheat (a disputed sixth mode, Dehydrate, is left out until the manual confirms it) | Air Fry, Roast, Broil, Bake, Reheat, Dehydrate |
| Warranty statement | 2-year limited warranty for mechanical defects; 90 days for non-mechanical parts | 2-year limited warranty for mechanical defects; 90 days for non-mechanical parts |
What could change your choice
Measure the food footprint you need, inspect the manual's clearance instructions and confirm exact-model accessories. Unknown dimensions and coating chemistry are not equivalent to zero or an adverse finding. Current price, stock and personal budget can reverse a specification-based preference.
Number not verified: official source
Number not verified: official source
PRO 4qt Slim Air Fryer: model-specific notes and limitations
This is the official Oatmilk variant page; the model number is unknown. Features names five modes. The introductory text also mentions Dehydrate, but we leave out that disputed sixth mode until the manual confirms it. Width, depth and height are explicitly labelled.
basket and crisping tray: Manufacturer describes ceramic nonstick made without PFAS, PFOA, PTFE, lead and cadmium. Source
PRO SmartCrisp 8qt Air Fryer: model-specific notes and limitations
This is the official Oatmilk variant page; the model number is unknown. It has a digital touchscreen and a shake reminder. Width, depth and height are explicitly labelled, and the coating claim applies only to the components identified.
basket and crisping tray: Manufacturer describes ceramic nonstick made without PFAS, PFOA, PTFE, lead and cadmium. Source
Sources verified 2026-09-14. Comparison is based on manufacturer statements, not our testing. How we research.