I believe that "Sagem" coils are the OE to the V6, but it seems that these are the ones that occassionally fail.
Peugeot ones tend to be supplied by "Valeo" which seem to be of a better quality and 'appear' to fail less frequantly.
As Oldskoolbaby said above.. if you want no further issues.. take the Trophy coil route.
Personally, I'm sure all of mine are Sagem.. I've had 2 fail on me in 2 years. Next time one goes, I think I shall replace them all for Valeo coils. Which I'm sure are nearer the £23 mark each, comparred to £40 odd from Renault for Sagem.