Used both last year, Sean fixed some issues with the xlights not starting if the show begin time had passed and you are still in the total run window.
Towards the end I used only the LSP scheduler. If you don't use network drives, it runs like a champ, network drives dont' seem to behave under windows properly so would cause me some issues.
This year will run the LSP scheduler again if I don't get my second Pi going with the FPP.