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 |
| Width (in) | 8.22 | 12.95 |
| Depth (in) | 14.37 | 16.25 |
| Height (in) | 11.37 | 12.83 |
| Rated power (W) | Unknown | 1700 |
| Cleaning | Removable basket and crisping tray are dishwasher-safe. | Removable basket and crisping tray are dishwasher-safe. |
| Documented modes | Air Fry,Bake,Roast,Broil,Reheat | Air Fry,Roast,Broil,Bake,Reheat,Dehydrate |
| Warranty statement | Unknown | Unknown |
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
Exact Oatmilk official variant page. Model number unknown. Five modes are enumerated in Features; introductory prose also mentions Dehydrate, a disputed sixth mode excluded pending manual. Width/depth/height 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
Exact Oatmilk official variant page. Model number unknown. Digital touchscreen and shake reminder. Width/depth/height explicitly labelled; coating claim applies to identified components only.
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.