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ronoh55This is how I understand it. I may be wrong on the details
The pi2 is built on a different type of processor (arm7 vs the arm 5(?) of the pi 1) It is backwards compatible with much of the old processes, but it will have some inconsistencies. The separate image for the pi2 is tweaked at the kernel level to make everything work properly.
You should be able to put a clean pi2 image on an SD card and copy over all your customized settings and roms and it should all work as is. You will have to reinstall Kodi and any other extra programs you might have added yourself. Hope this makes sense and helps.