A:Answer Source: CNET (https://www.cnet.com/reviews/vizio-e55-f1-review/)
The E-Series has a 60Hz refresh rate panel -- Vizio's claim of "120Hz effective" is fake news. So is Vizio's "Clear Action" spec, which it says is lower on the E-Series than the M series because "Thanks to the M-Series' greater panel brightness, the duty cycle can be lower, which offers greater motion clarity." Since you'll have to engage the dim, flicker-prone Clear Action setting to notice, however, that's not a big deal (see below for more).