You're very lucky that I am actually putting up an intelligent argument with you. I stopped doing that with most Tanzanians here because most of them lack knowledge and argue like Primary School kids. I will take your arguments one by one.
1. Your argument about Norway and UK is misplaced. You see, the UK has a much bigger economy according to those statistics. But the same statistics do mention that the UK has a lower GDP per capita (due to higher population) than Norway, a lower HDI than Norway, a lower living standard than Norway, can't match the population welfare of Norway and scores worse than Norway on ALL HUMAN DEVELOPMENT STATISTICS according to the same WB and IMF statistics. Using the UK-Norway example on Kenya and Tanzania is false at best and ridiculous at worst. That argument would be valid if we were comparing Kenya to Mauritius, not Kenya to Tanzania. See, Kenya has a slightly smaller population yet a bigger economy, better welfare, higher salaries, higher HDI, better infrastructure, higher literacy, generally better schools and ranks better than Tanzania in MOST human development statistics.
2. Both Tanzania and Kenya are developing countries. They are both poor countries but arguing that that invalidates the fact that Kenya is ahead of Tanzania is absurd. You've seen your countrymen pop up from nowhere on every thread on this forum posting pictures of slums in Kenya to 'prove' Kenya is worse than Tanzania. You see, for a country to be ahead of another country, it doesn't have to solve all problems it has, it doesn't have to have everyone living an awesome life. If we argued that way we could also say China and Brazil and South Africa are neither ahead of Tz or out of the LDC simply because they hve millions of people living miserable lives. See? That doesn't make sense at all. Kenya just needs to be ahead of Tz for it to be ahead of Tz. Kenya has more millionaires, more middle class and less people living below the poverty line than Tanzania. It has a better electricity connection, a higher number of people with access to social ammenities and 'luxuries' such as Cars, TVs etc than Tz, it has better education facilities than Tz and better more organized cities and meets the criteria to be a non LDC country. That puts it ahead of Tz.