Personally, I think knitting is easier.
When I first decided that I wanted to learn how to knit or crochet, I checked out a book on each, my mom tried knitting, and I tried crochet. I got frustrated with both after a while and put them away. I was bent on learning crochet because I had heard that it was faster, but then after trying knitting again, it just clicked. Crochet is still hard for me.
Once you get down the rhythm of it, you can knit and watch TV at the same time without looking down more than once every few minutes, which is cool. Also, I think that knitting is more attractive that crochet. All crochet stitches look kind of the same, but with knitting, there are so many techniques that you can use to make the fabric to look different (IE- different stitch patterns like stockinette or ribbing, cables, and far more varied lace than you can create with crochet. Knitting isn't really all that math-y unless create your own patterns or modify existing ones to fit you. I've also found that gauge is easier to find with knitting.
Another thing that I think is worth mentioning is that knitting has a more extensive community than crochet. Of course, maybe that means that you should learn crochet and help build it up.
Edited for typos