Can anyone tell me the difference between these two different Deere suitcase weights. They appear to identical, Deere justs seems to have changed the part number. I ask because I have a line on a set of the old part numbered ones and can't see why either wouldn't fit my X590. Correct me I'm wrong but didn't Deere recently revamp their parts system, I assume that means changing part number too. Thanks.
Old Part Number: R66949
John Deere 42-lb Weight- R66949
New Part Number: UC13263
John Deere 42-lb Quick-Tach Suitcase Weight - UC13263