------
## 最终结论
```python
def diff_consecutivenums(lst):
    return [lst[i] - lst[i - 1] for i in range(1, len(lst))]

# Test cases
assert diff_consecutivenums([1, 1, 3, 4, 4, 5, 6, 7]) == [0, 2, 1, 0, 1, 1, 1]
assert diff_consecutivenums([4, 5, 8, 9, 6, 10]) == [1, 3, 1, -3, 4]
assert diff_consecutivenums([0, 1, 2, 3, 4, 4, 4, 4, 5, 7]) == [1, 1, 1, 1, 0, 0, 0, 1, 2]
```