Depends on in which sense you mean. Doctrine, yes obviously there are differences there.
Degree of religiosity? In my experience Muslims even here in Scandinavia are generally much more religious than Christians. In Denmark, most “Christians” you meet are sort of cultural Christians who go through the motions on different occasions. I’m not sure if really they believe any of it. They show up in church for marriage and funerals, and dance around a pine tree on Christmas while eating themselves half to death (but hey, so do I). That’s basically it. If they’re religious they keep it private. In fact you rarely meet someone who ever speaks about their religious beliefs unless you very explicitly ask them about it, which could probably be considered somewhat impolite depending on the person. I don’t remember ever having spoken to very explicitly religious Christians besides Jehovas Witnesses who come knocking on Sundays once in a while.
Muslims are generally much more literal or invested in their beliefs, both in how they dress, what they eat, how seriously they take and celebrate religious holidays, and so on.
Of course these are broad generalizations and only reflect my personal experience, so exceptions are bound to exist.
In terms of arguments for belief I hear muslims make(which I mostly encounter on the internet), they’re basically the same.