Hi Yamba4
FYI....I am a Sunova fanboy, loud and proud.... totally joined at the hip with these wonderful folks.
I know it's a little confusing to unravel all of the information.
I will try to simplify the numbers best fit your questions.
First.... size and stability of board discussed
FRP has progressed down considerably in size and stability, so his boards all come at different times in his progression.
Skate 8'10 x 32" at 141 liters is a VERY stable board at his size.
Speeed 8'10 x 29" at 130 liters is a big drop is size and stability.
Creek 8'7 x 29.5 at 115 liters is a moderate drop in size and stability
Boards you asked about
Hypernut 8'6 x 31.5" at 132 liters - weight to volume ratio is 1.7 ( your weight, times 1.7 = 132 liters)
Skate 8'6 x 30.75" at 124 liters - weight to volume ratio is 1.6
Both fall comfortably in the "intermediate" range for stability... based on volume alone.
Both boards have forgiving and have easy outlines for stability
Given the outlines of both boards, the Hypernut will be more stable than the Skate
You also asked about the Creek... the Creek is a high performance board with
some stability tools built in, but not a "stability board", so that would require you to ride a bigger size.
Creek 9'1 x 31.2" at 136 liters - weight to volume ratio is 1.74.
the shape is not as forgiving as either the Skate or Hypernut, but this size should be fine at your size, provided you allow some time to adjust to the drop in size and shape.
Sunova board feedback...
Wave catching :
The Skate has a flatter rocker, so faster and easier paddling into waves.
Conditions that the board is best suited for:
Skate - low power waves with sloping wave face..... low nose kick and flatter rocker doesn't do well in steep drops.
Super fast and playful in the soft waves, very stable in chop and a favorite of mine in proper conditions.
It "Skates" more than carves because of it's wide moon tail.... very fun board
I prefer the Skate over the Creek in soft summer waves.
Creek - all conditions and sizes up to DOH
This is a very high performance board with
reasonable stability designed to make performance, accessible to more people.
However, this board may be too big of a jump for you at the moment.
The Skate and Hypernut seem to fit your daily conditions best.
If you haven't seen my Skate videos... I'll post one here for you.
(you can access the others from my channel)