[fiiv]

They're kind of different things. Graal is an attempt to create a polyglot environment. For example, using Python and Javascript in the same environment. For example you might be working on an application where the web server managed by the web team is written in Node and your data scientist team uses Python scripts to deal with the data, but they need to run in the same environment. Graal lets you re-use that environment for both.

Node and Deno are dedicated runtimes to run Javascript using the V8 engine. Both provide a standard library of additional functionality to make them worthwhile beyond just browser code.