The hilts look like Gayo hilts which is Sumatra, but not Palembang. The blades do look Javanese, but it's hard to tell from your photographs. There are many forms of Sumatran blades that more or less follow Javanese pakem.More detailed images would help. IMO both of these keris are mismatched so it's hard to say which is more genuine to the blade. If in fact the blades are Javanese then perhaps the one with the Javanese sheath, but the hilt would still be incorrect.
Would love to see more detailed photos, especially of the hilts which look quite nice.
