Me too. I don't understand how someone wouldn't want some extra pasta. :D
It's technially conveying different information. Saying you don't want so much of something is a more general statement that you do not want an amount that you would consider too much for you.
Saying you don't want that much of something implies a direct comparison, as if you are looking at the hefty plate of pasta and exclaiming that you do not want that much pasta.
It is a rather pedantic distinction since either would work in practice to convey approximately the same thing, but I feel it is worth mebtioning regardless.
If I'm not mistaken, "that much" would be "que mucho" whereas "so much" would be "tanto". I'm new to adjectives, though, so I could be completely wrong. Input from an expert or native Spanish speaker would be great.
I wrote "I don't want a lot of pasta" because that seems more normal in English. "A lot" and "so much" do have subtly different meanings, but "so much" isn't normally used in English to refer to the quantity of physical items. Mostly it's used to talk about the intensity of an emotion, e.g. "I hate this pasta so much."
I'm overthinking this. Maybe it's a just me thing?
I am astounded your translation was accepted because it is hardly "correct". If you are an English speaker you must agree that, altho similar, there is a real difference in the two expressions. Duo must be getting pressured by many incorrect translations into accepting it. Limitations of the wisdom of crowds, maybe?
I think got the difference between tan/tanta(s)/tanto(s) vs. Mucho(s)/mucha(s).
There is a huge pile of pasta on a table, and you have a plan to eat all of it.
At first glance you'll say "There is a lot of pasta on the table to eat" You use "mucho" or whatever version is appropriate to describe the existing state of the pasta before you set out to eat it. "Hay MUCHA pasta en la mesa para comer" For the duration of time it took you to eat all that pasta, from the time you started, till you are done, you'll say "There is a lot of pasta on the table to eat." But this time you'll have to use TANTA or which ever version is correct to describe the situation that you're in at any duration of time. "Hay TANTA pasta en la mesa para comer."
And when you finally do finish eating all that pasta, you are now decribing the current state of the pasta stating that there was a lot of pasta on the table, so you go back to using "MUCHA, etc..." to describing. And also if you are telling someone how there was a lot of pasta WHILE you are eating it, you go back to using TANTA, etc., "Hay MUCHA pasta..." - The existing state of the pasta, before and after you ate it. "Hay TANTA pasta..." - The existing state of the pasta being OVERWHELMING during the time you were eating it, that's why there is SO MUCH.