Unlike the hard drive, Microsoft redesigned, and even printed new stickers for, the Xbox 360 E's RF module.

The new module is labeled as model 1575, compared to the old model number 1409. That's 12% more model number!

While much of the board is largely unchanged, the absence of the power button backlight found in the Xbox 360 S is easily noticed.

Even Microsoft's X857052-001 IC is the same part from the 360 S' RF module.