Search List

Can anybody let me know , 

what is difference between 

#set($query = "group:113" )
$searchQuery.Add("FieldFilters", "0,category,forum")
$searchQuery.Add("Query", $query)
$searchQuery.Add("Collapse", true)
#set($results = $core_v2_searchResult.List($searchQuery))
count $results.TotalCount

and


#set ($searchQuery = "%{}")
#set($query = "type:forum && group:113" )
$searchQuery.Add("Query", $query)
$searchQuery.Add("Collapse", true)
#set($results = $core_v2_searchResult.List($searchQuery))
count $results.TotalCount

because i am getting different no of records