Hi
sysxlogins is a table, and syslogins is a view, which, looking at the definition, does a few things like convert the database id to a database name. It also converts the bitmask column containing the status value to 13 separate columns containing flags for things like whether a login is sysadmin etc.
I'd say you would normally use syslogins rather than sysxlogins for querying.
syslogins
Duncan