The components are better quality, but there is nothing wrong with the components that come on the 3. They certainly aren't going to fall apart on you anytime in the next few years. The 3 has Sora level components and I've had a touring bike with it that had countless miles on it and was a good 15 years old and functioned flawlessly.
I don't see any problems with the 3 model.
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Demented internet tail wagging imbicile.