What's the difference between dBFS and dBU metering? (bx_consoles)

These two articles thoroughly explain how digital 'dBFS' metering differs from VU and dBU analog metering. The bx_console plugins utilize traditional Neve console VU metering. And as you will see in the articles below, there is a big difference between what some other meters are telling you and what the bx_console meters give you.

• http://www.soundonsound.com/sound-advice/q-whats-difference-between-ppm-and-vu-meters
• http://www.audiorecording.me/what-is-the-difference-between-dbfs-vu-and-dbu-in-audio-recordings.html