Need help with Tiger of Sweden shoes, model: Sampe

Good evening dear people, I need your help with my new shoes from brand: Tiger of Sweden, model Sampe, which is fully made out of leather. I have never had a shoe of this type (full leather) and quality. I am mostly wearing European brands in size 43 / 43,5 (Polo Ralph Lauren (Heritage), Adidas excluded) and American brands (e.g. Gant,) 43, where i have a slight room on both for toe (appr. 4-5mm). Any brand I wear is US 10 in size. My foot is 27,6mm and 10,4mm length (normal to narrow feet).

So, what is the case? - Tiger of Sweden Sampe shoes, size 43 feels comfortable, but big on foot and while walking - heel moves up and down (1-3 mm), size 42 feels tight like espadrilles and like exact size, however, I am concerned whether it will feel fine (not pressing toes and becoming unwearable) if I wear them over the day. Has anyone experienced the same with this model. Please share your experience. thank you.