The fundamental difference between these plans....is that one is a plan and the other is simply a statement to make a plan.
This answer from a question I asked recently addresses why the Alexandria Ocasio Cortez's resolution that you cite does not contain details:
Recognizing the duty of the Federal Government to create a Green New
The thing you called “the Green New Deal” isn’t actually the Green New
Deal, it’s a statement that the government should create a Green New
Deal sometime in the future, along with a very broad description of
what that should look like.
So Rep. Ocasio-Cortez's resolution is not a plan, just a call to make a plan. However, Senator Sanders's Plan is his detailed proposal that is his way of enacting this call to make a plan:
As president, Bernie Sanders will launch the decade of the Green New Deal, a ten-year, nationwide mobilization centered around justice and equity during which climate change will be factored into virtually every area of policy, from immigration to trade to foreign policy and beyond.
As to your specific question, these texts largely address the same issues, but Senator Sanders' plan contains specific solutions, whereas Rep. Ocasio-Cortez's resolution contains overarching goals.