For a levels I myself have decided on economics, math, physics and computing, I also plan to go into a tech based career, possibly doing computer science at uni.
business is definitely seen as being weaker than economics, it is described as vocationally based and is less intense based on my research. You probably thought this already but business focuses on, well, businesses, while economics details on the economy of the country, wow that was undescriptive but I'm sure you can see what I'm getting at.