This is cool: "Ignite allows for most of the data structures from java.util.concurrent framework to be used in a distributed fashion." https://ignite.apache.org/features/datastructures.html
Apache Ignite, based off the commercial distribution Grid Gain is newer to market.
Apache Geode, based off the commercial distribution GemFire, has a long history in the market.
Apache is happy to provide a home for any community that is willing to adhere to our governance rules and traditions. Competing projects are OK.
Projects are almost never rejected because preparing a proposal for incubation is rigorous and many projects who would be a poor fit self-select out.
Source: former VP Apache Incubator, who has both helped prepare successful proposals and privately counseled projects who decided not to come to Apache.
How does Apache Goede compares to Apache Ignite (advertised as "in-memory data fabric"?