A comparison of three popular electric cheese graters by Top Product Comparisons notes that each brand has advantages and disadvantages over the other two. The models reviewed are from Cuisinart, DeLonghi and OMRA.
The Top Product Comparisons review notes that the DeLonghi and Cuisinart are cordless models, while the OMRA, a heavy-duty grater for large cheese grating purposes, is cord-powered. The Cuisinart CMG-twenty features an ambidextrous ergonomic handle, a twenty-minute battery life and three unit drums for slicing, shredding and grating different foods. It comes with a 3-year limited warranty and is BPA free. The Cuisinart retails for approximately $40.
In contrast, the higher-priced DeLonghi grater has a single grating drum. It prices for around $97 and is equally suitable for grating cheeses, garlic or ginger. The DeLonghi has a high-capacity battery that lasts significantly longer than the Cuisinart model. The review notes that this model grates more powerfully and smoothly than the Cuisinart model. The DeLonghi is also BPA free and features a 1-year general warranty.
The OMRA grater, manufactured in Italy, is a sturdily designed countertop model. It is recommended only for hard foods, but is able to grate 40 pounds per hour. It is powered by a 100-watt, 110-volt cord and is not portable like the Cuisinart and DeLonghi models. It is also significantly more expensive than either model, valued around $250.