it is not possible to made Red Moscow Guppy with a "red head"
FULL RED MOSCOW.
American/European/Asian Full Red and Russian Full Red have difference understending of these phenotypes. Russian Moscow Full Red have about 70-80% of Red color on the body and fins. Your opinion is 95-100% of Red color for Full Red strains.
The definition of Moscow cannot have redhead.
Shure. Moscow supegene have a few different phenotype points (few genes).
One of them - big spot on the front of the body (no red color).
Your photo is no good quality. Pherhaps it is not Moscow Full Red.