Either one should give you a hint as to what happened to cause the panic.Mine is a 15" MacBook Pro. As far as the crash log is concerned, do you mean the one the system offers to send to Apple, or one of the many logs available in the Console?
The 2015 MacBook Pros are the only models I know of that don't have the hibernation issue.
I use hibernatemode=25 on my 2015 Air and it is able to wake from a powered-off state with no issues.