An interesting source on the Pentecostal church says: Today, there are over 400,000,000 Pentecostals who identify themselves as Pentecostal or charismatic in mainline churches. An interesting fact is, the Pentecostal movement got its start in 1905 by Charles Parham an an American holiness evangelist.
The New Testament church got it start in 33 A.D, quite a difference in time. An amazing observance in a little over a century is how this church grew to this size. You wonder how many of their members would fall for a church where some of them could actually speak in tongues (other languages).
For what the New Testament Church actually teaches read the articles in the category: Church of Christ Doctrine.
You still have time.