What's the difference between CyberLink PowerDVD 365 and PowerPlayer 365?

PowerPlayer 365 is a lightweight software player on PC that focus on media library sharing and video file playback features.

PowerDVD 365 is a disc-oriented fully-packed player that supports not only media file playback, but also video disc playback (e.g. Ultra HD Blu-ray/Blu-ray/DVD-Video).

If you don't require video disc playback, and prefer a more lightweight player, you may consider a PowerPlayer 365 subscription as your playback solution:
https://www.cyberlink.com/products/PowerPlayer