1. If your current OPT based EAD expires in January 2025, a DV AOS based EAD is irrelevant in your case, as the DV AOS based EAD will no longer be valid once your applicable DV based FY ends, which will be on Sept. 30th, 2024. Nonetheless, you may apply for an AOS based EAD card if you wish.
2. The NBC adjudicates the EAD, while the FO adjudicated the AOS. Processing of one has no bearing on the other.
3. Working with OPT based EAD ensures you have a valid status to fall back on if, for any reason, the AOS application gets denied. An AOS based EAD (once used to undertake authorized employment) does not give you any protection in such a situation as you’ll no longer have a fall back status if AOS application gets denied.