I think my two sons might not be related!
DS1 really driven academically, very motivated and ambitious, loves learning, essays, etc. Also very solitary and self-reliant. A leader, doesn't care about the herd. Tennis, badminton, swimming are his sports although he follows football and knows a lot of facts. Career plan mapped out - Oxford, investment banker, millionaire 
DS2 "too cool for school" but works hard because hates to be bad at anything. Clever but unmotivated by academia. Reading, essays, thinking - all boring. PE and hands-on stuff is brilliant. Looking for a practical career in building or sport. A follower, can be led astray. Team sports all the way. And very able at any sport he tries. Also left-handed, which adds an unusual twist into our family of righties. Has no desire to be like DS1, and in fact finds as many ways as possible in which he is better (except in his grades!!) Competitive is DS2's middle name.
I find it all fascinating!