collate - SQL Server '=' comparator Query case-sensitivity -

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which of these 2 queries preferred , why?

declare    @value1 varchar(16) = 'hello'   ,@value2 varchar(16) = 'hello'   ,@a int = 0  if convert(varbinary(max), @value1) = convert(varbinary(max), @value2)   set @a = 1;  if @value1 = @value2 collate  latin1_general_cs_ai   set @a = 2;


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