Programs list 'stethoscope' and leave you to interpret it. A thirty-dollar clinician model and a two-hundred-dollar cardiology model will both get you through a skills check-off. What you are being graded on in school is landmarking, technique and whether you can describe what you heard — not on resolving a subtle diastolic murmur in a quiet room.
There is also a practical argument. An expensive scope in a student's pocket, in a shared lab, in a building full of lockers you do not control, is the single item people most often report losing. Buy the lightweight clinician scope now, learn on it, and let the good one be a graduation purchase when you know which unit you are walking onto. Check your program's stated requirement first — some ask specifically for a bell, or a dual head, and that is the spec that matters, not the brand.