The answer probably comes down to resources. Do you have the budget and staff to go after both segments? Each will need a different sales and marketing campaign so this can sometimes be daunting when getting up and running.

If you need to pick one, which one proved your concept? Which has a stronger buyer persona? Which do you offer more value to? Also, which one can you monetize. If you're choose the same segment for each of those questions, then you have your answer.