where can buy IWR6843 ISK board with es2 chip?

I've heard that IWR6843 ic es2 is more better than es1 in people counting example?

1. can someone share your experience?

2.where can I buy/check if IC on the ISK board is ES2, not ES1 ? 

Shine：

请对照勘误表查看芯片表面打印来区分ES2, ES1版本。

Line 4:
60 GHZi = IWR6843 (ES1.0) Identifier
678A = IWR6843 (ES2.0) Identifier

www.ti.com/…/swrz087a.pdf

agatha kuan：

回复 Shine:

但是在下訂單的時候又看不到照片，怎麼確定買到的是ES2 的EVB 呢？

Shine：

回复 agatha kuan:

看到e2e论坛上的产品线工程师已回复您，请参考。
e2e.ti.com/…/3153667