The decision in plain terms
Choose Crispi 4-in-1 Portable Glass if you want the smaller advertised capacity. Choose 6.5-QT Air Fryer Pro XL 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 | Crispi 4-in-1 Portable Glass FN101ST · US | 6.5-QT Air Fryer Pro XL AF181 · US |
|---|---|---|
| Total capacity (qt) | 4 | 6.5 |
| Layout | single | single |
| Baskets | 1 | 1 |
| Width (in) | Unknown | 12.6 |
| Depth (in) | Unknown | 16.3 |
| Height (in) | Unknown | 14.17 |
| Rated power (W) | 1500 | 1750 |
| Cleaning | Accessories are dishwasher-safe. | Basket and crisper plate are dishwasher-safe. |
| Documented modes | Max Crisp,Bake,Air Fry,Recrisp | Max Crisp,Air Fry,Roast,Bake,Reheat,Dehydrate |
| Warranty statement | 1-year limited warranty | 1-year limited warranty |
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.
FN101ST: official source
AF181: official source
FN101ST: model-specific notes and limitations
Includes swappable 4-qt and 6-cup containers; only one cooks at a time. Glassware claim does not establish material of every cooking component. 2026-10-03: official FN100-series guide; SharkNinja support lists FN101ST as covered, though the guide text names FN100. It keeps objects 6 in from the vent, without rear/side/top distances.
glass container: Manufacturer describes glassware as PFAS- and PTFE-free. Source
AF181: model-specific notes and limitations
Manufacturer length treated as front-to-back depth; height is published manufacturer value, not our measurement. 2026-10-03: exact owner's guide asks for adequate space above and on all sides, with no distances.
Sources verified 2026-09-14. Comparison is based on manufacturer statements, not our testing.