CDI-1 Modules

Just wondering what the difference is between the older CDI-1 41004 and the newer 41009,
From what i can see the newer unit has a tacho output and also has its own inbuilt power relay plus a different connector ?
Any performance difference ?
From what i can see the newer unit has a tacho output and also has its own inbuilt power relay plus a different connector ?
Any performance difference ?