A baby is NOT the Father, Husband, or Head of the family.
Same "substance"- of COURSE! God is spirit, angels are spirit- demons are spirit- so YES, Jesus is spirit. ("Wind, Breath" in Hebrew and Greek- illustrating an unseen active force)
Begotten and created mean the same thing; one is more personal, though. Unless, you're thinking God was pregnant and has a womb...
God isn't a unique Species- any more than angels and demons. The Title "God" designates Him as the Most Powerful spirit being, in EVERY way- even Jesus subjects himself to Him.
Facts my friendly adversary- not WTBS spin, nor Church Coprolite.