Aggregator transformation performs aggregate calculations, such as averages and sums.
Sorter Transformation is used to sort the data
Aggregator uses aggregate cache to perform aggregate calculations
Sorter uses Sorter cache to perform the sort operation
Aggregation done by using aggregate expression with conditional clauses,
Sorting is done based on the sort key and the order of sort key
Aggregator uses Incremental aggregation to perform aggregation calculations incrementally.
There is nothing called incremental aggregation in sorter