dear student,

B.sc (H) CS is a course that will have introductory Physics and Mathematics, and the focus will remain on CS and subjects related to it for all three years. Your classes will be relatively shorter when compared to (P) CS and there will be less practicals.

B.Sc (P) CS is basically an applied Physical Science degree with specialization in CS. It's nothing more than a fancy name. The course covered in this degree is "huge", what makes it worse is there is no direction to the curriculum. You'll be studying everything from Physics, Maths, Eco, Eng, and other thousand subjects in three years.

hope  it helps!!