I think the laminate is heavier than the wood, the wood is definately heavier than the plastic.
Heavy is good for recoil, but a 77/97 is a pretty heavy action. Even the plastic stocked one with a light weight scope fitted is going to tip the scales at 10lb approx.
If you know you're going to use a scope - don't even bother looking at '77s, due to the low comb.
The different stocks change the balance of the rifle. i.e. the Blackline plastic stock makes the gun feel front heavy.
The reach to trigger is shorter on the 'fist hole' design stocks, great for smaller hands, but they don't have a thumb churl for shooting 'thumb up'.
The blue laminate 97K looks great, but as above, weight - plus it needs a set-back trigger blade for most hands.
The STL finish looks lush, but it certainly isn't made from 'stainless steel'... seem to be paint on top of nickel plating.
I went for the 97K Blackline STL, then bought a target stock as well, because targets is my thing.
I suggest definately try before you buy if at all possible. And it's no good just shouldering an unscoped example in a gunshop.
HTH