Does a turntable mat make any difference?

I forgot Terry Bozio.

It takes approximately 4 mm of adjustment on the bearing side of the tonearm to make 1 degree of difference on SRA. ( angle of the stylus)We can play from 100g to 200g records which have different thicknesses without any adjustments.
My point is that it does change the sound not because of the difference in height but because of the of the change in VTF or cartridge weight. Most people think it is because of the change in SRA. If you want to play with mats go ahead just measure the VTF after the change so you are comparing apples to apples. I feel the included record mat is like the power cable that comes with your phono stage. it’s there to test that it works. In the end it is up to your ears, the only ones that truly matter. 

The Enlightenment might be out of fashion but empiricism still works. See for yourself—or rather, hear.

Agree on Lee Morgan.

Hi end turntables probably don't have mats because, depending on all the various cartridge and record thicknesses, there would be a myriad of mats that would be 'best'.

For me, at least, it's all about thickness/VTA.