Capacity Differences
The energy star website advertises the Frigidaire's drum capacity in cubic feet based on the DOE standard, while manufacturers use the IEC standard, which just inflates the size of the drum because it takes into account the size of the drum with an agitator, which is about .4 - .5 cubic feet. So a 3.9 cu ft front loader would be equivalent to a 4.4 cu ft top loader with an agitator. Basically, both should hold the same volume of clothes.
Don't things always look bigger in the mirror????