There is truth and error in both systems, IMO
It's a very interesting and IMPORTANT topic, but don't get in a hurry to work out all the details by choosing a system and then adopting everything that system says. Let the Holy Spirit and the Word teach you, and TBH, I don't think God honors our "fast food society"
If you listen to what extrabiblical sources to inform your decision,. You will either end up confused, or you will end up choosing a system and have less than 50 percent chance of being right. If you take your time with God's Word and depend entirely on the Spirit, He will reveal all things to you in due season.
I'm not saying it is bad to read extra-biblical books, but people seem to use them as shortcuts. When I don't understand something, I just pray about it, keeo it in mind, and keep reading and studying God's Word, and eventually He gives me an answer in something in a scripture text that I hadn't noticed before that answers my question.
Blessings