How to get a 1:1 recording when using real time record for MIDI?
Kontakt
Audio record track = Input Kontakt srereo
The audio has less volume than the traditional way of: Tracks> Bounce to Tracks

You can see the WAV difference.

The level of 'bounce to track' will be dependant on what options you have checked in the bounce dialogue. You can, for example, bypass the output fader level setting of the Kontakt instrument track by unchecking 'track automation'. If the Kontakt track fader is below 0db, the resulting bounced track will be louder than the realtime recorded track (which IS affected by the fader level) as in your example.
 
 
Details here:
 
https://www.cakewalk.com/Documentation?product=SONAR%20X3&language=3&help=Dialogs1.14.html