The way I am reading into the images, the difference is not just with the canopy. Whole line of the back of the plane is now a tad less sloped. The top of the canopy itself is almost straight now. While the FC31 had a slight drop in the line starting pretty much right after the brace of canopy point. That line goes on further from the canopy glass as well.
Basically, the new plane has more of a hump behind the cockpit in volume, compared to the old one. Though the difference isn't great.
Still, that difference might amount to hundreds of liters of volume.
I'd wager there's a chance the change was there due to fuel requirements as well. It's plausible PLANAF wanted X amount of range under given conditions and that the design simply needed even more fuel (on top of whatever might have been achieved through allegedly larger wings and more advanced/pricier construction methods). One of the best places to put fuel inside a plane is that central point behind the cockpit. All fighters have their big internal fuel tanks there and when additional fuel is needed in novel variants, its often the first place where redesign is done - easiest to place additional fuel without having large impact on other characteristics.
Now, are wings and tails indeed larger - is still impossible to say. What other carrier planes teach us - that change is more than likely. But this image is simply not good enough yet to make proper measurements. I tried, but there's just too many uncertainties due to perspective and lacking FC31 images that are an EXACT match perspective wise.
What does seem to be likely is that the horizontal tails are slightly bigger in span than the wings at their folding point. Which is not strange.