The discrepancy in training hours reflects the different roles in that, to give just one example, the mil SAR chaps conduct low-level, overland NVG ops. If civvi-SAR took on that particular specialization their training bill would rise accordingly.
The whole problem with the civvi vs mil SAR debate is that you cannot just directly compare what the current units offer. Most people are completely ignorant of this but wade in with their ill-considered, and usually incorrect, opinions anyway. Unfortunately, the result is the usual slanging match that ensues.
Hopefully, both the mil and civvi boys and girls at the coal face know enough about each other to be able to ignore the tripe and get on with the valuable job they all do.