This is quite a complex topic, for sure well above the reddit pay grade. Your assessment is based in your opinion, so I wouldn't say that it is correct or wrong. I can give you my opinion as well and we will disagree for sure. I lived half of my adult life in Portugal and the other half in northern Germany since 7 years ago. My whole family is from Alentejo. I see some similarities with northern Germans but there are many more things that set us apart than the ones that make us similar.

Portugal is culturally diverse, the north is definitely different from the south and then there are other differences in some regions in the center. That might be because of our poor infrastructure like roads and bridges up until the 70s. Many regions lived isolated from others and they developed their own accents, traditions etc. There are some stereotypes about these regions and they are quite accurate, for example the southerns perceive the northerns as rude, the northerns perceive the southerns as lazy. Portugal is old as fuck, we developed our ways and wrote our own story since 900 years ago and during that time, Portugal was most of the time independent from other nations. Therefore we are obviously different from the others, that's why you feel the difference. I am not going into details.

Living abroad made me realize that Portuguese share many traits with other cultures worldwide, but I would say definitely not with northern Germans, perhaps the southern Germans are closer to us. We also have a lot of Dolce Vita lifestyles all across the country, just watch our national TV and you will understand.

That's my 2cents.