Recommended method of setting up two layouts; halloween/christmas

[n8huntsman]

When I originally created my layouts earlier this year I created my Christmas layout in a separate folder.  Copied everything over to a Halloween folder, changed directories removed Christmas specific stuff and added Halloween stuff.  The lights themselves are largely the same.  Main differences are talking faces, candy canes driveway outline, etc.

I thought that would work well but now I'm second guessing myself.  Once I got the lights connected I realized I had made a few minor errors in channel counts.  My current method would require me to modify both layouts which isnt ideal.  Also, if I add something new to the lights, I'll have to do it twice as well.
Is there a better way?  Perhaps using multiple  "Previews" in the layout tab, or maybe using multiple "Views" in the sequencer/display elements tab?   The challenge is that the talking faces are run by a Renard 64 channel controller that is repurposed at christmas time to run the candy canes.

Looking for options to weigh pros and cons. 

Thanks

[Gilrock]

To me channel counts and start channels are the least of my worries.  I usually confirm them as I'm setting up my show and then just re-render my sequences using a batch command.  Modifying both setups is really not that big of a deal.  Most people stress over the concept more than the actual time it would take to type in a few values.  To me it's like complaining that it will take an extra 15 minutes every year.