How does wood hardness affect the sound of a TT on a wood TT platform?

I'm interested in purchasing a Butcher Block Acoustic TT platform for my Luxman PD-171A TT. The Maple Block has a Janka Wood Hardness Scale of 1450 while the Walnut is rated at 1010. How does the hardness of wood affect the sound ? Trying to decide which way to go.
Hi, I doubt it would have any effect on the sound. the question is what effect would it have on the isolation. The maple will be about 25% heavier for the same size. If your TT stand is on concrete and the stand is sturdy I would go with the walnut for aesthetic and durability reasons. Maple expands and contracts more than walnut with humidity changes so it is more likely to check with age. I can not think of any situation that the extra weight would be a sure benefit. If you have bouncy floors the only things that will help are tip toes or a well suspended table. I n that case a wall shelf would be the best way to go and again I do not think there would be a significant difference. I would go with the walnut, oiled if possible. Shame to lacquer such beautiful wood.
I think the first thing you have to ask yourself is whether your tt is sensitive to what it sits on.  My Linn was extremely variable depending on shelf material, while my Basis is not.  I don't know what your table sits on now, but try a different shelf material like glass or corian or whatever you have and see if it makes a significant difference sonically.  That said, I truly do not believe one can predict whether they will prefer one shelf material over another without trying it.  There are just too many variables to make a blanket statement that harder wood does X and softer does Y.  
And even if you could predict, that doesn't mean you would prefer it.  
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Hardness of wood is related to stiffness which is useful in resisting bending forces, I.e., isolating against rotational forces. Hardness is also an important characteristic of the cones the wood board should be resting on.
Elizabeth thanks for all that information on Butcher Block. My TT sits on a heavy 3 shelf MDF audio rack w/metal screw in poles. The feet are spiked . The floor is carpeting w/a cement base. My neighbor is the Apartment Laundry Room. There seems to be some inaudible vibration as some of my throw carpets over time move around. Both the TT and the Luxman 38 Tube preamp are a shade on the warm side. I think the Bryston 2.5 SST2 balances that out w/a neutral sound. Right now I'm looking at the Edge cut Maple and Walnut. The TT is fairly big so I will go for the 19"x16"x3" block. Just need to decide as to what feet to put on. 
@geoffkait OP might need springs with that vibration which changes everything!
I’ve shocked enough monkeys for one day, I suspect. 🙉 🙈 🙊
The most vibrationally sensitive device in the world is suspended on glass strings, so to speak.

Any guesses as to what device it is?

Electron microscope?

Gravitational waves detectors?

nanotube resonator? for measuring down to yoctogram (one septillionth of a gram – 10 to the -24th grams) or the mass of a single proton.

Ok i'm running out of ideas.

I was just discussing that a couple weeks ago on these fora. Coincidence? 😳
Back from Google. Global earthquake detection. The glass (silica fibers) are 400microns thick so chosen as they are immune to expansion and contraction from temperature changes. This thermal noise would impact negatively on measurements.
The wood in a plinth of turntables has much more influence for example than the wood used for making table tennis rackets.
Have you ever tried to use table tennis rackets with identical rubber but different woods?

I have been trying for a long time and there are macroscopic differences.
I believe that for the plinths the same thing is the same, the problem is that nobody has ever built plinths with different woods and then made tests and measurements with laboratory instruments.