GFS & NOGAPS: Massive disagreement

As I mentioned in an earlier post NOGAPS and GFS do not always agree... actually a lot of time they don't agree. However, sometimes the differences in them are really quite massive.

The charts below are for the same day and time and are off of the same model run. The coloured areas show the amount of precipitation that is expected to have fallen in the 12 hour period prior to the listed time - so in this instance between 0600-1800 on Saturday 31 October. As you can see they don't look very much alike. My gut instinct says NOGAPS is closer to being right and I really hope that's the case!