What are the main differences on the S61 compared to the S60?

The main differences between the S60 and S61 are:
Improved display: 5.2″ FHD Display
More memory: 64GB/4GB Memory
Improved processor: Qualcomm SD630 Octo 2.2GHz
Larger battery: 4,500mAh Battery
Improved camera: 16MP Rear Sony Sensor, 8MP Front
Latest OS: Google Android™ Oreo (with update to P)
More waterproof: IP68 and IP69
Higher quality thermal imaging
Increased thermal temperature range (up to 400°C)
Indoor Air Quality Monitor
Laser Assisted Distance Measure