Nexus S is taller of the two devices but it is thinner and lighter than Incredible S. Nexus S weighs 129g in contrast to 135.5g of Incredible S. It is also only 10.9mm thick compared to 11.7mm thickness of incredible S. Nexus S has over curved edges which makes it look like a soap bar, Motorola pebble fans might be attracted to this design but others are more likely to be impressed by more stylish and attractive Incredible S even though it is a little on the heavier side compared to latest smart phones.
Incredible S features S-LCD capacitive touch screen with resolution of 480 x 800 pixels and 16M color support. The display is Gorilla glassed with HTC sense UI. It has multi touch input method, accelerometer and proximity sensor. Nexus S has Super AMOLED TFT capacitive touch screen with same resolution and color support as Incredible S. The display is contour i.e. curved glass display for better viewing. It also includes all the other features that Incredible S has. On the display front Nexus S AMOLED display outclasses the S-LCD screen of Incredible S.
Processor and OS:
Nexus S has the Android 2.3(Gingerbread) OS while Incredible S features Android 2.2(Froyo) which is upgradeable to Android 2.4.Both smart phones have processing power of 1GHZ which ties it out.
The main difference between the two smart phones is the camera. Incredible S features 8MP camera that can record HD 720p video at 30fps. It also has a secondary 1.3MP camera. Nexus S has 5MP camera that record WVGA video at 30fps. It has a VGA secondary camera. Nexus S supports geo-tagging and touch focus like Incredible S which also has the additional image stabilization feature.
Nexus S has 16GB of internal storage and 512 MB of RAM whereas Incredible S has 1.1GB of ROM and 768MB of RAM. Both phones support memory extension via micro SD card up to 32GB.