If you don't know why you want 11 speeds, then the Sora equipped bike has a lower ratio at least which might help you on some hills. After you ride if several thousand miles you'll know based on your own experience and won't have to ask others next time. Getting the lower priced bike will leave you some to start saving for your next bike.
105 11 speed would be my usual choice over Sora 9 speed. But the 105 bike has too many components on it that aren't 105. And while the Sora bike has a lot of other cheap components, at least it has hydraulic brakes which would be my choice for any bike that comes with disc brakes.