What are some of the differences between Ponyboy and Darry?

There are many differences between Ponyboy and Darry
Curtis.  First of all, their looks are much different.  Ponyboy is much smaller than
Darry, who is "six-feet-two, and broad-shouldered and muscular."  Ponyboy also has
"light-brown, almost-red hair and greenish-gray eyes," while Darry has dark brown hair
and "eyes that are like two pieces of pale blue-green
ice." 

Darry is a much more logical thinker than Ponyboy. 
Ponyboy is artistic and admits that he doesn't use his head as he should.  Darry
"doesn't understand anything that is not plain hard
fact." 

Darry, who was also athletic and popular (despite
social factors), gave up his scholarship when his parents
died. 

And now
he didn't have time between jobs to even think about college.  So he never went anywhere
and never did anything anymore, except work out at gyms and go skiing with some old
friends of his
sometimes.

Because of the
sacrifices he has made, Darry is hard on Ponyboy and pushes him to excel at his
studies.  Darry knows that Ponyboy has the intellect to succeed, while he had only
physical skill.

The struggles of losing his parents and
being responsible for his two younger brothers made Darry harder in many ways.  The
challenges of being raised by his brothers and also losing his parents made Ponyboy
softer (more artistic, more "feeling").