The small fan is great for a small space where the fan will hit you directly – like a desk. The larger one is only a tad more powerful but will do a better job circulating air in a small room. I posted photos of the small and medium fan side by side for comparison. Also – The color of the fan is lovely but not as bright as seen in the photos.

https://www.amazon.com/Vornado-VFAN-Vintage-Circulator-Green/dp/B00TX79BK6