Electric Erasers Review: Office Depot Cordless Eraser & Sakura Electric SE2000

I have had the Japanese-made Sakura SE2000 electric eraser for many years and find it to be quite a reliable, powerful, and efficient portable unit for tough erasing jobs that require great precision with a light touch. According to the manufacturer's website, the SE2000 does all the heavy work by rotating the eraser at 12,000 RPM. Thus I was not really on the market for another electric eraser, but I just could not pass up the Chinese-made Office Depot cordless eraser when I found it in the dollar bin with the pack of 30 eraser refills marked down to 50 cents at a Red Tag Sale clearance. I was rather curious to see how both models compared considering that the Office Depot cordless eraser usually retails for about ten bucks while the SE2000 ranges from $29.99-49.99 depending on the retailer.
Each electric eraser runs on two AAA batteries. The eraser refills fit either model, but the Office Depot model's clamp chuck is too large to fit the SE2000 eraser port.
Both units are quite compact and portable, so they can be easily included in field sketching kits.
One visible difference between the two becomes apparent when the clamp chucks and eraser refills are removed: The Office Depot cordless eraser clamp joint port is made of plastic while the Sakura SE2000 is a metal cylinder. I suspect the latter will prove to be more durable in the long run since the plastic port is more likely to break after repeated use given the tight fit with the metal chuck. Still both units' light weight and motorized power feel very similar on the hand. The Office Depot cordless eraser motor is slightly louder than the Sakura SE2000.
The Sakura SE2000 was slightly more efficient in erasing the oil-based Caran D'Ache Pablo colored pencil sample swatches as shown by its lighter wavy trail.
Both electric erasers are easy to control and maneuver as shown by the straight paths cleanly erased across the waxed-based Prismacolor pencil layers on the smooth Bristol board.
Sample swatches were drawn on Bristol board with HB and 10B Mitsubishi Hi-Uni pencils to test the graphite erasing power of both erasers.
The Sakura vinyl eraser was slightly more efficient in removing the HB and the 10B graphite marks from the Bristol board.
While either unit proved that they can effectively erase or at least significantly lighten fairly stubborn layers of colored pencil and soft graphite, they tend to be messier to use throwing debris over a wider radius of the working surface. Thus I needed to to use my drafting brush to clean the area after conducting these tests. Still for daily regular use, my first choice for a graphite eraser remains the Pilot Foam eraser.
Considering the marginal differences in erasing performance, the Office Depot cordless eraser would be an adequate choice for an introductory electric eraser at a fraction of the retail price of the Sakura SE2000.