The Hikvision DS-2CE10KF0T-FS  excellent 3K ColorVu cameras for outdoor surveillance. The DS-2CE12KF0T-FS might be a better choice if low-light performance is a top priority, could be a good value option if wider field of view is more important.

Similarities:

• Image Sensor: Both cameras use a 3K CMOS sensor, capturing high-resolution video at 2960 x 1665 pixels.
• ColorVu Technology: They both boast exceptional color night vision with ColorVu, providing clear color images even in low-light environments.
• Fixed Lens Options: Both offer 2.8mm or 3.6mm fixed focal lens options for you to choose from depending on your desired field of view.
• Other Features: They share many other features like built-in microphone, switchable signal options for compatibility, weatherproof (IP67) build, and metal construction.

Key Differences:

• Aperture: The DS-2CE12KF0T-FS features a wider F1.0 aperture compared to the DS-2CE10KF0T-FS's F1.2 aperture. A wider aperture allows more light to reach the sensor, potentially resulting in even better low-light performance in the DS-2CE12KF0T-FS.
• White Light Distance: The DS-2CE12KF0T-FS boasts a longer white light distance of up to 40 meters, compared to the DS-2CE10KF0T-FS's 20 meters. This translates to greater illumination for enhanced night vision in the DS-2CE12KF0T-FS.

Choosing Between the Cameras:

• Prioritize Low-Light Performance: If capturing clear images in extremely low-light conditions is crucial, the DS-2CE12KF0T-FS might be a better choice due to its wider aperture and longer white light distance.
• Need Wider Field of View: If you need to cover a larger area and a wider field of view is a priority, both cameras offer the 2.8mm lens option.
• Cost Consideration: There might be a slight price difference between the two cameras due to the variations in aperture and white light distance.