Any thoughts on a solid hickory platform under my tt


I have access to some beautiful 2" thick hickory butcher block instead of maple any thoughts on vibration control vs maple 
oleschool
If interested, I wrote this review on a similar line: https://forum.audiogon.com/discussions/symposium-segue-iso-2

I had a maple butcher I used with my turntable and was amazed at how little isolation the maple provided.

Yes and that pairing or tuning to your setup ..  Which varies .. I may try walnut it matches my classic and walmounted on steel with spikes and my classics feet i doubt my beat up ears will hear any difference between almost any in this mount .. Jmho .. 
That's why I mentioned rosewood as the next wood I would try after maple. Then cherry. Both are musical woods. Mahogany is another wood worth trying, would probably be too warm for my set-up. The place that you mentioned has purpleheart block for about $500. That's what I said - exotic wood is expensive if you want to compare even a few. I might try cherry, even if the difference was small it would be worth it. And if it makes things worse, well, I could use an excellent cutting board in the kitchen.
A suggestion:  If it's density and stability is what you seek, you might try stone.
My shop (not audio, sorry) is next to a countertop firm.  They generate an enormous amount of 'drops' from their projects, many suitable in size for any tt/arm combo.  If you can generate a drawing showing what you want, they can make it.
And with the range of choices in material, pattern, and colors you could make something really exquisite for about what you'd spend on a wood one.  Not that wood isn't lovely, but...