Virtually everyone doing online dating is talking to multiple people at once. Both of these guys are probably talking to other women as well. The likelihood that you will actually go on in-person dates with both guys, both guys like you, and you like both guys is almost zero. Most first dates with people you meet online just plain old suck. Having chemistry is impossible to tell online so, unfortunately, a lot of the time it just isn't there.

What is more concerning about your post is that you feel unable to say "no" to someone. What do you do in real life when you are not interested in someone? Do you say no? You must have standards and be able to tell who you are interested in and who you are not interested in. These guys should not feel interchangeable to you. You should get a sense for who they are as individuals and the ways in which you are (or are not) compatible with them. You should feel a sense of agency in who you date, and not just wait around for someone to say "yes" to you and then accept him (whoever he is).