The console in between Han and Chewie is a little less cramped together than in the replica image. Harrison actually needs to reach over to get to a switch in the life size version of the cockpit whereas in that replica he wouldn't need to. In the second image the camera is placed exactly where the rear wall would be instead.
The Cobra cockpit is definitely wider but only slightly longer than the Falcon's. Those two "crates" you can see at either side in the back of the Cobra's cockpit can easily be replaced with 2 more chairs and you'll basically have a wider slightly more spacious version of the Falcon's pit.
These scale comparisons for example look quite bang on in my opinion if judging the two ships by cockpit size:
https://i.imgur.com/hjbWonp.jpg
https://i.imgur.com/8he9Ku6.jpg
Ok info on the Millenium Falcon.
Given the sizes 34m long x 26m wide for the falcon and 27m long x 44m wide for the cobra mk3 the comparison looks more like this;

The millenium falcons cockpit module was only 8'8" long x 8' diameter as shown on these set drawings.

This looks something like this in person;

As you can see here the Cobra cockpit is much much more spacious;

To be honest though I think that the Cobra cockpit is a nice size. It's the ones in the fighter type ships i.e the Vulture, Eagle, iCourier etc that seem a bit odd, like a tiny seat sat in a greenhouse at Kew Gardens.
The FDL is another example, although the 'bridge' looks good close up on that. From a distance it looks like a small fighter with an almost BSG style canopy. It's only as you draw in do you see the scale;
Distance

Cockpit Zoom

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