Diferences between a 250mm and a 340/375mm

I've been trying to figure teh diference between these 2 models.
They both look very similar but there are probably many diferences between them, although the body shape seems very close to me.
Can anyone point me the diferences? I'm talking about the cars that ran at Le mans 1953 for example and the 250mm that ran at the panamericana...a few examples below..

250mm
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340/375mm
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I think asking this question in the Vintage section will get you a quicker and more detailed answer. But I think the cosmetic differences are few. Maybe the 375 has some more agressive details. Wheelbase might be different?

Edit: yes, it seems the wheelbase of the 250 is 2400mm and 2600mm for the 375.

 

Yes, after i investigated a little bit, seems the 375 has a bigger hood, since it has a bigger engine.....
You are right about the vintage section of course, but sometimes people are not very "helpfull" (to put it in a nice way), i never felt at ease in that part of Ferrarichat. But here there are also many knowleageable people that are more forthcoming and more willing to help...and many times, modelbuilders have better eye for these things than the "experts".