G'Day Y'All
A 12" has immense light gathering capacity with a visual limiting magnitude of approximately 15 and 45% more light gathering capacity than a 10".
The 12" scope will perform quite nicely on faint deep space objects such as galaxies and nebulas under mildly light-polluted suburban skies
Structure can be seen in galaxies and planetary nebulas, with an LPR filter, from barely visible blurs in smaller scopes.
Globular clusters are usually resolved to their core.
Jupiter pops out of the sky with fine structural detail