dorubird
The unskilled mechanic blames his tools!
Common optical features:
1 Chromatic aberrations are similar in both binoculars, being present only on the edges in an acceptable proportion for me, but perhaps unacceptable for some.
2 The resolution on the center is excellent and is identical in both binoculars, resolving the same number of details.
Swarovski advantages:
OPTICAL
1 Swarovski has the clarity extended over the entire surface of FOV, and Nikon's clarity decreases starting with the last 20%.
2 The overall contrast of the image is much higher with Swarovski.
3 Nikon's colors have a slight yellowish tinge compared to Swarovski, which has a cooler but more natural shade!
4 The brightness is clearly higher with Swarovski, also counting the difference of 2 mm in the diameter of the lenses.
MECHANICAL
1 Adjusting Swarovski eyecups is done with much smoother and more pleasant clicks. At Nikon, the adjustments are more jerky.
2 The lenses of the eyepieces are a bit larger (24mm vs 22mm) resulting in a more generous eye relief.
Nikon advantages:
OPTICAL
1 Even if the light resistance is almost similar between this two binoculars, it is still a little better with Nikon. It is a chapter where these binoculars are not great, but still in most cases not very annoying
2 The field of view is a bit larger 8.3 degrees vs 8 degrees
3 The globe effect is evident with Swarovski, noting that the objects are visibly reduced when they are brought to the edges.
4 With Nikon I can focus very close, even at 1.7m, while with Swarovski only at 2.10m
MECHANICAL
1 Nikon dimensions are considerably smaller. The weight too. It is very small and light without feeling its presence in the backpack!
2 The focus wheel moves very smoothly and accurately on Nikon, but on Swarovski it has a grainy feeling and moves more easily in one direction than the other, with a slight hesitation when changing direction.
3 The exterior finish is much better at Nikon because Swarovski has a serious problem (from factory, recognized by Swarovski) with the armor that became sticky and cracked. Yes is true, this even if the binoculars have been carefully cared and maintained, and used even less than the other binoculars!
CONCLUSIONS
A binocular is judged as a package that includes all the advantages and disadvantages in one.
So, as a subjective feeling overall, Swarovski has the brighter and more contrasting image with a feeling of strong clarity even to the edges, somehow keeps you in tense feeling.
Instead, Nikon has a opposite character, being more comfortable because it gives me a feeling of relaxation and naturalness when I look through it. 
The image through Nikon is more gentle and enveloping and through Swarovski more aggressive and palpable.
I really like both binoculars for what they are!
1 Chromatic aberrations are similar in both binoculars, being present only on the edges in an acceptable proportion for me, but perhaps unacceptable for some.
2 The resolution on the center is excellent and is identical in both binoculars, resolving the same number of details.
Swarovski advantages:
OPTICAL
1 Swarovski has the clarity extended over the entire surface of FOV, and Nikon's clarity decreases starting with the last 20%.
2 The overall contrast of the image is much higher with Swarovski.
3 Nikon's colors have a slight yellowish tinge compared to Swarovski, which has a cooler but more natural shade!
4 The brightness is clearly higher with Swarovski, also counting the difference of 2 mm in the diameter of the lenses.
MECHANICAL
1 Adjusting Swarovski eyecups is done with much smoother and more pleasant clicks. At Nikon, the adjustments are more jerky.
2 The lenses of the eyepieces are a bit larger (24mm vs 22mm) resulting in a more generous eye relief.
Nikon advantages:
OPTICAL
1 Even if the light resistance is almost similar between this two binoculars, it is still a little better with Nikon. It is a chapter where these binoculars are not great, but still in most cases not very annoying
2 The field of view is a bit larger 8.3 degrees vs 8 degrees
3 The globe effect is evident with Swarovski, noting that the objects are visibly reduced when they are brought to the edges.
4 With Nikon I can focus very close, even at 1.7m, while with Swarovski only at 2.10m
MECHANICAL
1 Nikon dimensions are considerably smaller. The weight too. It is very small and light without feeling its presence in the backpack!
2 The focus wheel moves very smoothly and accurately on Nikon, but on Swarovski it has a grainy feeling and moves more easily in one direction than the other, with a slight hesitation when changing direction.
3 The exterior finish is much better at Nikon because Swarovski has a serious problem (from factory, recognized by Swarovski) with the armor that became sticky and cracked. Yes is true, this even if the binoculars have been carefully cared and maintained, and used even less than the other binoculars!
CONCLUSIONS
A binocular is judged as a package that includes all the advantages and disadvantages in one.
So, as a subjective feeling overall, Swarovski has the brighter and more contrasting image with a feeling of strong clarity even to the edges, somehow keeps you in tense feeling.
Instead, Nikon has a opposite character, being more comfortable because it gives me a feeling of relaxation and naturalness when I look through it. The image through Nikon is more gentle and enveloping and through Swarovski more aggressive and palpable.
I really like both binoculars for what they are!
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