Soil is easier (my opinion) if you have quality soil. a little slower growing than hydo wich makes it perfect the people like me that tend to be a little lazy and put things off a bit. (another opinion of mine) i think you can get tastier bud, given a proper flush cure than hydroponics but hydro will grow faster and tends to produce a little more...........but this is also strain and environment dependent.
*just a soil guys opinion*
I have seen some jaw dropping grows on here that have been hydroponics and have been totally jelous of the outcome. both has its ups and downs.