False tops on VIX

What is the difference b/c Top A & B?
Top A in Oct 2005 was a true top for the VIX and bottom for the SPX b/c the bearish pattern on the MACD histogram/line graph also the indicators did not trace much higher highs like Top B. Top B in June 2006 made a much higher high on the MACD histogram/line graph showing strength to the upside and there should be a retest of the top or a likely newer higher.