This is basic maths and ratio. Comparing absolute amounts is very rarely the method of choice because it paints a very unclear picture as all values exist in relation to each other which the difference loses (which is why you ended up comparing the ratios of the difference as 3.6x greater!
).
Consider country A has 100,000 population and 30,000 immigrants, and country B has 50,000,000 populations and 90,000 immigrants. In terms of the difference, Country B has 3x as many people to worry about entering the country, or 60,000 more people. But in relative terms of percentage growth, country B has only 0.2% growth whereas country A has 30% growth. Clearly that's a far bigger impact on country A when described in relative terms to the existing population and it's implied capacity to support that existing population.
As a more extreme example, consider lengths of string. String A is 2 cms long. String B is 4 cms long. String B is much longer than string A. String C is 1,000,000 cms long. String D is 1,000,010 cms long. That 10 cms difference is way more than the 2 cms difference between A and B, yet in real terms C and D are effectively the same size.
Differences lose the context of relativity, which is why we very rarely use them and almost always use ratios and percentages.
In the context of what can be done on screen, Scorpio is set to be proportionally the same difference between 4Pro as PS4 is from XB1. That is, whatever graphics XB1 can produce, PS4 can produce an amount better, and Scorpio will be able to produce the same sort of difference with 4Pro (likely just a bit of image quality and a few FPS).