The source of the leak is XDA Developers; their own source is unknown.

Moto G8:

– Snapdragon 665,
– 6,39′ HD+ display,
– main camera 16 Mpix (f/1.7) + macro 2 Mpix (f/2.2) + superwide 8 Mpix,
– selfie shooter 8 Mpix (f/2.0),
– battery 4000 mAh.

Moto G8 Power:

– Snapdragon 665,
– 6,36 cala FullHD+ display,
– main camera 16 Mpix (f/1.7) + macro 2 Mpix (f/2.2) + superwide 8 Mpix + telephoto 8 Mpix f/2.4,
– battery 5000 mAh with QuickCharge 3.0, power 18 W.