What's the difference between define-syntax and this tutorial? (if
any)
http://ling.ucsd.edu/~barker/Lambda/

They "seem" to the doing the same thing, though I don't know if there
should be any subtle differences...

I can follow the tutorial perfectly and understand what it's doing. Is
define-syntax basically the same?
The only difference that I can think of, is that the tutorial produce
only the body of the function while define-syntax needs to cons
"(lamdba (args)" to the body.