The planner and executor in Postgres-XL is quite different, and direct node-to-node data transfer for MPP parallelism results in big performance gains. Any bug

The planner and executor in Postgres-XL is quite different, and direct node-to-node data transfer for MPP parallelism results in big performance gains. Any bugs in XC in the planner and executor would not show up in XL (that is not to say that we in Postgres-XL do not have any of our own bugs :-)). Bugs related to GTM could show up in both, but in Postgres-XL additional precautions have been taken to reduce the likelihood of problems.