Not only that, the CDE and 29000s might share the same manufactuer but they don't share a design team.
The CDE is a Design Triangle product, like the Heathrow Express.
The 29000s were styled and designed by Dolmen in Dublin.
Same people who did the CityGold coaches.
The 29000s are an excellent design in my opinion. the NIR C3Ks would be way over the top for commuter services and would have serious maintenence and cleaning issues.
The key problem with the 29000s is that IE are trying to pass them off as new intercity services in Sligo... it's utter nonsense. The whole process has simply given the whole concept of DMUs a bad name in Ireland.
To get back on topic though:
The CDE interior is, in my opinion, spot on for the Irish climate and landscape! I've travelled on it so far on a very dull day and on a very bright day and it was equally pleasant on both trips. The lights are diffused quite well and you can sleep.
In general, French trains are pretty dull onboard though. Many TGVs are pretty disappointing on board..
e.g.
