The name-dropping/link-dropping with an extra discord link that will likely expire long before everything else is tasteless.

A tasteful mention would look like this:

> If you're looking for a scene graph based engine instead of an ECS based engine, checkout $PROJECT_NAME at $PROJECT_LINK and here's an example $EXAMPLE_LINK

I can't vouch for the accuracy of the statement, but it clearly lays out the primary difference in value proposition, and 2-3 distinctions in value proposition would be good.

The goal should be to help people find what they are looking for, not spam.

Alternatives are only useful when adding to the conversation. Otherwise it comes off as tasteless promotion.

One example of a way alternatives add is comparing how the new release stacks up with alternatives.