Prototype of the Do.335B-3 not painted (except for tials). Guns in wings were absent.
Do 335B-2 with more powerful engines (DB 603LA with two-stage compressor, 2000 hp at take-off).
Prototypes V18, V19 and V20, remained unfinished but seized by the Americans in Obeipfaffenhofen.
The extra power was important, but engine development was delayed and they were not delivered.