'OpenLCA is a comprehensive LCA tool that can be used to assess a wide range of processes and products, while GREET is a program specifically designed to assess the environmental consequences of the transportation industry. While OpenLCA offers a larger database and more sophisticated functions, such as sensitivity and uncertainty analysis, GREET is a less sophisticated program that focuses on transportation fuels. The exact requirements of your project will determine which tool is ideal.'
There are many tools that one can use for impact analysis (e.g., doi:10.1088/1755-1315/506/1/012002).
As Aryan Shahabian noted, this description of GREET is from a DOE website: "The Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation (GREET) model is a tool that examines the life-cycle impacts of vehicle technologies, fuels, products, and energy systems".
Assessing the environmental effects of the production processes for bioenergy and biofuels is a specialty of GREET LCA.
GREET LCA provides modules for evaluating greenhouse gas emissions, energy usage, and other environmental implications in addition to a vast library of life cycle inventories for diverse feedstocks and energy sources.
A user-friendly interface, a variety of features for LCA analysis, support for several impact assessment methodologies, and the ability to import and export data in different formats are all provided by the open-source LCA software application known as Open LCA.
In the end, the user's individual demands and tastes will determine whatever tool they use.