Goods receipt in SRM or R3

Hello SRM Gurus,

I understand that GR can be done in either SRM or R3. We use the classic scenario so I know that my GR will get posted in R3. My questions are:

1. Are there any advantages to creating GR in SRM vs. in R3?

2. How do I specify whether GR is to be performed in SRM or R3?

Regards,

HP