Just out of interest I wondered what would be the most common choice to go for.
Both same price, both new builds, both 3 beds with similar sizes.
The detached a nicer layout downstairs close to a nice field and park (can see from lounge window), 3 off road parking spaces. Village closer to the major city with good school catchment. Not overlooked garden.
Semi has a bigger front and back garden (overlooked at back), garage. Village location but further out by 5-10 mins.