Once again, you have choices to make, that will end up impacting choices you will have further down the road.
How does it differ - having more than one topic idea in front of you instead of just one thing?
Is it easier? Because you can pick and choose? More difficult? Because you need to make a decision?
Different folks react in different ways to that sort of thing - would you rather have the structure of YOU MUST WRITE THIS or the freedom to pick and choose?
When you get right down to it, all topics are a form of "Open Topic", in that the only one that you are answerable to is yourself, and the votes of the readership. But sometimes that can be enough to sabotage your brain, and trip you up.
What techniques have you developed that have proven successful in approaching a new writing situation?