@AntiZig: actually they're both great, the only reason am only using MSIAB is its "Monitoring Graphs" you can show it In-Game for "On-Screen Display" while recording, other than that MSIAB has advanced options for recording.
PS: you need a fast HDD (SSD/raids helps alot in recording), and a powerful cpu to record in HIGH/Full frame, and also it depends on the resolution in game.
TIPS:
-for a med-end pc > lower the resolution of the game and use 1/2 frame with 90% of quality and use MJPG compression.
-if you got two HDDs(no raids), use the one that the game and OS not installed in it, use the less HDD usage.