I seriously doubt there is any differance in the fry sizes. Blues are proven to grow the fastest of all tilapia, includig the genetically altered and hybrids, unless fed hormones.

Where the Mozambique can mature up to a month before a blue, the added two to four months of life in the pond from the lower cold tolerance more than offsets the forage AMOUNT produced. spawning frequency and egg production are nearly identical for both. In warmer climates like Texas, the Blue may well survive several warm winters and overpopulate. This very real danger is greatly reduced with using the Moz.