Click the links below to see the three different generations of night vision in effect in different settings - daylight, a lit up area, and an area in complete darkness. Refer to the conclusion for my personal thoughts on the different night vision generations and their positive and negative properties.
While the three generations look very similar, there are some subtle differences. The later generations provide a wider range of brightness, allowing you to see things a bit clearer and in more detail. With a nearby light source, the earlier generations also generate more glare that partially obscure your vision; this is easy to see if you look at bricks of the building in the Daylight examples, or the floor and walls in the Lit area shots. In complete darkness, the third generation of night vision is the only one where you can actually see the details of the display on the detector - which is rendered almost useless with earlier generations. With some nearby light, though, this is less of a problem as the display is alot clearer with all night vision generations; this can be witnessed in the Lit area examples. In daylight only the third generation night vision provides a clear detector display which is especially obscured by the first generation night vision.
Click the links below to see the different scopes in effect. I haven't written a conclusion about these as the scopes have obvious differences, and choosing a scope is pretty much up to personal preference and possibly depending on what tasks you have at hand.