based on my guide
The FC block has the lowest number of notes printed,
so this could be called the most rare of the Hawaii notes.
It's price guide range go from VF/F $100 to Gem/CU $1,000
For the Hawaii Star notes, it looks like there are five different print runs. Each "print run" is from 12,000 to 72,000 printed notes. The guide prices range from $150 to $8,000.
This tells me that there are more star notes printed and that they trade at higher prices.
Star notes are more collectible to the common collector, so in most cases they have more value.
As for the FC block, it could be that there are just less collectors willing to pay more for this note. If I remember correctly the FC block was printed for mainland (48 state) collectors, so they could have a example of these notes. All the other notes were sent to Hawaii to be used in circulation.