My LGS has their copies of Genesys in as of today. And while I've not picked mine up yet, I did take the opportunity to compare the dice symbol distribution chart from page 18 of Star Wars: Force and Destiny with the chart in Genesys, and I can confirm that, minor aesthetic differences of the symbols aside, the distribution of symbols and dice facings are completely identical.
Assuming those charts also directly coincide with the facings and distributions of the physical dice, it seems to confirm that if you already have Star Wars dice, they are effectively perfectly usable for Genesys (even the symbols are not so drastically different that it's more than the work of a scant moment to process which symbols coincide with which between the two games).
I'd have taken pictures, but the idea slipped my mind.
Edited by Deathseed