There is no right or wrong answer to this question. It depends on your personal preferences and goals.
Why it depends?
If you are the type of person who thrives under pressure and enjoys competition, then applying for a position with more competition may be a good option for you.
What about the flipside?
On the other hand, if you prefer a less stressful environment and feel that you have a better chance of being hired for a position with less competition, then that may be the route you want to take.
But I am a freshie with little experience.
If you are early in your career, you may want to consider interviewing for a position with less competition. This will give you an opportunity to hone your interview skills and build your confidence.
And for the seasoned, skilled workers..
If the position is one that requires a high degree of skill or experience, then you may want to interviewed for a position with more competition. This will allow you to showcase your abilities and demonstrate why you are the best candidate for the job.
Ultimately, it is up to you to decide what is best for your career goals.