human physiology is human physiology.
there is absolutely no reason why taller people should train differently.
as for not looking big enough.... just remember basic math...
any 3 dimensional object (like the human body)
will when 1 dimension is increased by x (height, vertical)
and the shape stays the same,
become X to the third power greater in volume (mass).
a 5"0 guy who is 180 lbs lean (big)
would by this formula have the same build as a 7 foot tall guy
who weighs 493 lbs lean.
of course that just doesn`t happen so short guys are forever buffer than us
thats just how it is. however it matters not.
because when we stand next to them, its still clear we outweigh them by a ton.
im 6"4 and 16 yr old btw... i should still be growing