Tapered bale spears are easier to insert and remove from bales, while non-tapered spears are typically cheaper and more rigid. 
Tapered spears reduce bale damage and equipment strain. 
Comparison:
- Tapered: smooth entry/exit, less wrapping tear
 
- Non-tapered: better for stationary setups or custom frames
 
- Tapered preferred for high-volume use
 
Summary: 
Tapered spears are better for smooth operation and clean bale handling.