Lasha is definitely a different city. Although very westernized and also the Tibetan minority is increasingly oppressed by the majority ethnic Han , it is still a city worth visiting. For the markets, monuments, temples and most of all its people. It is a bit sad that because of the oppression that people suffer in Tibet , they dare not speak especially with tourists because they are scared of reprisals. But if you spend some time there and establish some link with the locals, leaving politics aside, at least overtly, your experience will be enriching.