Kept looking and found my answer.
"In game terms, the difference between non-human
tieflings and human tieflings is purely a matter of size.
Unless they have specific tiefling-related size modifiers,
the tieflings of each of these races are the same size as
their non-fiendish ancestors. They gain any of the bonuses
or penalties related to that size, but gain no racial bonuses
except those of the tiefling; beyond size, their humanoid
ancestry is purely cosmetic."