What is the "curious case" in this?
PSO was selling their Altron X at rs.110/l too before they introduced Euro 5 97RON fuel. Total are also about launch their Euro 5 compliant fuel, perhaps they are trying to get rid of their old stocks too. Keep in mind old Euro 2 high octane may also have dangerously high levels of MMT in fuel.
A higher octane fuel is not always a good thing when it is not recommended by the vehicle manufacturer, especially when it is Euro2. In such case, regular 92RON fuel would be better for the vehicle engine health as it would have lower levels of MMT.