My advice: choose the first, the most direct reason is that his treatment is more "quantitative" "direct"
And the job has a lot of space, you want to since you said the market "blank" if you do well
The treatment, the opportunity is certainly better, if you are afraid of doing a bad job to go away and choose the second, I do not think it is right, because the second has the potential to do so, the risk, management, treatment, future development and so on.
These are my suggestions for your reference.
Good luck in finding your ideal job!