User blog comment:Omega natsu2/Chapter 369: The Place Prayers Reach, Predictions./@comment-24467372-20140126160504/@comment-7418318-20140127100510

When Jellal was hit in Nirvana, there was an explosion. When ever someone or something else was hit by Dark Capriccio there was no explosion.

So either Zero used a different attack that only looked similar or that explosion was part of Jellal's defense.