Since Chevy has brought the Blazer to the LA Autoshow, so new unique characteristics of the crossover have come to light. While it may only be slightly larger than the Equinox, I think we can all agree that the new design language is much more appealing. https://www.trucks.com/2018/11/29/la-auto-show-5-things-2019-chevrolet-blazer/
None of these features seem unique to the Blazer, aside from the locking locking glove box. Will be a great feature when using a valet or leaving your car unattended for longer periods of time.
To be honest I doubt that Chevy would place and inadequate 4 cylinder in the Blazer just to meet their 'green quota'. Heck even the new Silverado is moving to a 4 cylinder engine and its got better outputs than the outgoing V6.