i9 processors have more cores and threads, higher clock speeds, and larger cache sizes compared to i7, allowing them to handle demanding tasks such as 4K video editing, 3D rendering, and gaming with ease. They also generally come with higher TDP (Thermal Design Power) and require more advanced cooling solutions.
In comparison, i7 processors are still powerful and provide excellent performance for most tasks, but they may struggle with very demanding workloads. If you’re a demanding user who requires the highest levels of performance, an i9 processor may be the better choice. However, if you don’t require the extra power, an i7 may still provide more than enough performance and be a more economical option.