Comparing specs of upcoming Linux phones

[Quarnero]

Purism’s Librem 5 page is (at the moment) stating they will deliver i.MX8M (Quad Core) max. 1.5GHz processor. Does this max. reference mean they are about, with batch Evergreen, to switch to Rev. 1.1 version of the 1.3GHz processor? This Rev. 1.1 main processor name is MIMX8MQ7CVAHZDB, and having CPU speed grade of 1.3 GHz (seeing this as advantage) with code: HZ. Note: i.MX8MQ7 requires a Dolby Vision™ license. Another eventual and good option with HZ abb. would be Lite version of the same processor (without Dolby - 12 bit depth), IMO. If Dolby license is blob (requires additional proprietary software, besides hardware) by itself than we might already have partial answer (on my obsolete Dolby question) related to Evergreen.

All above is based on kindly provided opinion/answer within this post:

@marty1885

AFAIK, the standard A53 core design can never go above 1.8GHz (on modern process, due to it’s relatively few pipeline stages and long critical paths). And, the A53 core’s area can grow 30% from a low power design (~1.2GHz) to a high frequency design (~1.5GHz).

So, assume NXP didn’t go nuts with their layout. They can either build a smaller and less power hungry chip with the same design. Or they can build one with a higher frequency but same power efficiency and space.

Edit: Removed unnecessary comment on memory types.

P.S. Maybe short opinion on energy consumption of DDR3L-1600 memory for phone usage from @lperkins2, please.