Wouter,
I may be able to clarify the Glider Inter14 for you.
They are completely different boats by different designers.
The Glider is 4.0m and the Inter14 is 4.3metres.
The Glider can be configured with main jib and spinnaker while the Inter14 has a bigger main and to my knowledge no jib or spin.

Regards,
Phill

I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!