oh i totally love both! illustrator has evolved so much, and now lets you do a lot more artistic stuff...
but it can feel a little strange especially if you havent used it in a while... i've always had a love/hate raltionship with some of the interface and font features in this program.
But your work looks totally made in vector... or is it photoshop?
i'll be happy to help you if you can't make something work in either programs.
It's vector, I used to work in illustrator only for technical fashion sketches, black on white , pen tool , reflect/ copy were the only tools - the most boring part of fashion design :)) so I had my misconceptions:)) but I still prefer photoshop and mostly I like the traditional