Not it's pretty clearly the Fawcett version as can be seen in the indicia on the first inside page. Perhaps the confusion is that the Fawcett series was continued by Charlton running 15-21. (It then became Danger and Adventure). Charlton started a second This Magazine ... series later running #12 - 16. That was the continuation of Zaza (which itself was the continuation of Charlie Chan which Charlton took over from Comic Media). This second series became Outer Space 17-25
Such is the way with Charlton -- an indexer's nightmare.