Hi @heku_ ,
Both normal marketing deliveries and message center deliveries and both type of its delivery templates will get logged in nms:delivery schema.
To get message center deliveries alone, In nms:delivery schema, filter >
[folder/@model] contains nmsDelivery
AND
[triggerMessage/@eventType] NOT EQUAL TO (None specified)

To get normal deliveries, In nms:delivery schema, filter >
[folder/@model] contains nmsDelivery
AND
[triggerMessage/@eventType] EQUALS TO (None specified)

Event type is enough to differentiate between both deliveries, but Transactional message center template (which is also gets stored in nms:delivery schema) will be displayed for the single condition of event type equals to (none specified).