When I create a datasource using web console it us "false" as default value for JTA property, while DMR declare default value == "true".
JTA=false makes sense only in special cases and should be declared explicitly by user, because if it's done silently could drive user to wrong assumption and on how transaction are tracked in a (non-XA) datasource.

I haven't verified other attributes, but may be useful to check default values are respected for all of them because non-default value is normally a special case users have to set conscientiously.