You criticise the comparison then proceed to make a vacuous one yourself.
An anecdote to disprove your generalisation: I used to work in Europe (Reading, UK) and now work in Africa (Nairobi, Kenya) and can confirm that 80k in Reading would give me a far higher quality of life than 20k in Nairobi.
Africa and Europe are both large, diverse places, just no point making a statement like this.
your anecdote barely holds btw. comparing nairobi on of the most expensive cities of africa to a third tier city in england. just compare it to london to see.
Consumer Prices in Nairobi are 43.15% lower than in Reading Consumer Prices Including Rent in Nairobi are 49.86% lower than in Reading Rent Prices in Nairobi are 63.97% lower than in Reading Restaurant Prices in Nairobi are 49.25% lower than in Reading Groceries Prices in Nairobi are 44.13% lower than in Reading Local Purchasing Power in Nairobi is 78.67% lower than in Reading