Hi Rob,
Those cars you mention are not available in the USA, never have been and probably never will be; so VW's EOS advertising for the USA market can be a bit different then for the world market.
But since I don't know about those other ones, are you sure they have a working sunroof inside the hard top in the up position? The EOS actually has a very complex Webasto system.
You should remember that on the EOS you can have the hard top up as a "coupe" or "sedan"; you can have the hard top up with the sunroof open or closed; and you can then retract the hard top for full cabriolet. It was not apparent that the Renault Megane CC or the Peugeot 307CC had that same feature, if so they don't make a big deal about it. They call their entire mechanism a retractable sunroof. I think VW's marketing (they made a big splash of it here) was that they are the only car that has an integral, working sunroof inside a retractable hard top.
It is such a complex system that every dealer will have one complete mechanism to drop in place should er... when a customer's unit "goes bad"; that way the customer is not kept waiting while the mechanic tries to figure it out. They drop a new one in, and probably send the non-working unit back to Webasto.
What will this be like in 30 years???[:0]
Michael Salemi
1969 280SL
Signal Red w/Black Leather
Restored