As far as I know Augmented Strings allows you to
1. Layer your own sound - Build your own ensemble with Augmented STRINGS’ multi-engine flexibility. Experiment with 2 layers, each containing 2 sound sources, and weave your own custom combination of sampling and synthesis for a string sound that transcends the real thing.
2. Advanced sound design - Rearrange, modulate, and customize every aspect of your hybrid ensemble.
Augmented STRINGS’ simple interface and diverse preset library brings quick results to keep your flow moving - but when you want to get complex, you can. The Advanced panel takes you deep into the inner workings of the instrument, giving you detailed control over your sound sources, modulation, performance, and beyond.
These features are not included in Augmented Strings Intro. If you have Augmented Strings Intro, you'll see there's no "Advanced" button next to the "Main Out"
Hopefully, folks at Arturia will upgrade current users of Augmented Strings Intro either for free
or provide a discounted upgrade.