JAR FCL does not list any differences which require differences training on an MEP
This raises an interesting grey area. It is the expressed intention of the JAA that the presentation of MEP(L) and MEP(S) in Appendix 1 to JAR-FCL 1.261 indicates that differences training is required between any two MEP(L) types or MEP(S) types (e.g. from a Duchess to a Seneca, etc). Indeed, this was presented by the CAA as the reason that they could not mandate differences training between the DA42 and conventional MEP aeroplanes - because the JAA already mandated it.
I agree that it is a difficult interpretation but, if you read paragraph (a) of the explanation, it states
"the symbol (D) in column 3 indicates that differences training is required when moving between variants or other types of aeroplane which are separated by the use of a line in column 2." Now, admittedly, there is no separating line in column 2 of the MEP entry but the contention of the JAA as represented by the Head of Approvals at the CAA is that this merely indicates that
all variants or other types within the class are subject to differences training.
Perhaps Whopity, who clearly has the ear of the CAA, would care to comment?