XCOM Data Transport Compatibility with other XCOM releases. Is there a matrix indicating compatible levels of XCOM across all the platforms? Is there a lifecycle chart?
All supported versions of XCOM are compatible with all other supported versions of XCOM.
Here is a link to the lifecycle chart for all XCOM products.
You will need to log in with your support.ca.com credentials to see this chart.
All versions and service packs of all products on this list that are NOT EOS (end of service) or EOL (end of life) are compatible.
NOTE: When it comes to features like SSL or UNICODE you need to run Versions of XCOM on both sides which support these - otherwise you cannot use the feature.