I don't know what the difference is or if they are interchangeable but the way they are listed is that the 1065 part is for biles with the lower engine serial numbers and the 1069 is for the later engines. The DX200EE... is the engine number. A quick call to Fredette may be helpful since he could probably tell you what the difference is and whether they will interchange. Might as well thank him for his knowledge and buy the part from him also.