Backup from 6.1 to 6.5

[raththemercenary]

Hey all,
I want to upgrade from a 6.1 mightyrom to a 6.5 psyki rom.

1. What exactly can i backup that is still compatible? (i have contacts synced with outlook but thats pretty much it. Was wondering is i could backup past text messages, possibly apps or other settings??? If you can recommend anything else maybe im just being forgetful)

2. Can i just flash via SD and load the new rom that way, or would i have to load stock 6.5 first for some reason?

Any help is appreciated. Thanks in advance