In reality, you won't be able to focus on both. I know people say you can do it, and Elon Musk is a great example of a successful entrepreneur with two awesome companies, but one startup is hard enough on you and the people around you.
My take on this is that you're delaying a decision on what startup to focus on and relying on YC to make that decision for you. In reality, you should work on the startup that you WANT to work on, the one that solves a problem you care for.
This will also increase your chances to get into YC. Being committed is pretty much a requirement to get into YC (or have a successful company for that matter).
My advice is to choose between one of your projects, commit and do everything you can to make it awesome.
My take on this is that you're delaying a decision on what startup to focus on and relying on YC to make that decision for you. In reality, you should work on the startup that you WANT to work on, the one that solves a problem you care for.
This will also increase your chances to get into YC. Being committed is pretty much a requirement to get into YC (or have a successful company for that matter).
My advice is to choose between one of your projects, commit and do everything you can to make it awesome.