Since they realized that more then 50% of thier cu...

Since they realized that more then 50% of thier customers came from, Switzerland, ...they raised thier prices step by step,to almost Swiss price level.
Example ? Yes, here we go ...try to buy Silicon Spray for your Car, in Swiss you can get it for about 4,- CHF ( Do it ) ...and try buying this here at OBI, you have to pay at least about 7,50,- EUR ( and No, it does not depend on the Brand , it was the cheapest they got in thier Store :(
My advice would be; compare thier prices carefully, you will be surprised.
About thier selection of goods? well, it does not matter if you go to Bauhaus, Do it, Obi or any other Big chain, they al carry at least all the Main Brands, so there is not really a difference, but the Employees are better trained then those of Do it, or Bauhaus, ...but that will of course as allways depend on your Personal experience with one of them.