Hi u/1234acb, Thank you for posting your question. Apologies for the confusion.

According to the two model numbers that are displayed on both websites, they are only part numbers, which serve as a standard for all distributors, wholesalers, and resellers.

Both sites are using the same 256GB internal storage, which we have verified. Additionally, BestBuy and Amazon provide a 256 GB SD Card, which is why it says 512GB.

Hope this helps. -Elle

Country?

Sub-$200 options aren't great, Moto G Power 2021 may be the best option in the US outside of a carrier deal. Edit: Moto G 5G is $200 on Amazon. It's better than G Power 2021. If you can go to $250, Moto G Stylus 5G 2022 is also on sale.

If you're open to used/refurbished options, maybe Galaxy S10e though battery life won't be great (but it is relatively small). LG V60 is a bigger option with better battery life.