The difference is that 'high moral standards' is something out there, societal, set by others, a bar or threshold of standards to maintain 'according to morals, rules or regulations'. Your personal values are something entirely different. They are a result of your culture, family, education, work, friends, acquaintances, neighbours, etcetera but also your own personal ethics. For example, you might refuse to bet on horses as a matter of principle because you think horse racing is cruel. Because you have those values, you are resistant to others expecting you to bet on horses. Likewise, where your ethical values are sincerity*, nobody can make you act insincerely. For example, demanding that you believe the car that started the fire at Luton was a Range Rover Sport 2014 simply because they say so.
*Finnish culture is not dissimilar to English culture in that respect. People don't like insincerity and pomposity is likely to be pricked. A friend mentioned that when she goes for a walk in England she smiles at people because she thinks that it might cheer up someone who might be lonely. Here in Finland if someone smiles at you in the street, people would wonder what trickery you were up to, as it is likely to be seen as fake or manipulative. Refusing to be insincere or inauthentic is what makes people think Finns are stubborn. But it is not stubborness, it is being true to yourself and being authentic. Why would you let anyone bully you into agreeing with their beliefs if you do not? It is also to do with the protestant culture of being modest, honest and not being impressed by show-offs. It is also good for mental health to have a set of values that are not imposed on you by others.
So that is the difference.