Dassault CEO said NGF dimensions will be close to the mock up shown. Also NGF is to be compatible with future aircraft carrier of french navy and France wont be building super carriers similar to US. So definitely NGF is going to be medium class as per IAF classification which is lighter class now in USAF classification. French navy chief already confirmed they want NGF at max 30 T if future AC is 75 T.Wait and see what will be NGF.
As for now only a mock up shown in Le Bourget aero show... the final result may be different, as it was possible to see on several pictures released month and years ago by Dassault.
For exemple the serialy produce Rafale is smaller and lighter than the Rafale A demonstrator. Why? because the lighter it is, the less costly it is. (and because M88 was smaller than F404 also )