text: Title: Questions about new NMS Export for Detect, Segment, Pose and OBB YOLO
  Body: ### Search before asking
  
  - [x] I have searched the Ultralytics YOLO [issues](https://github.com/ultralytics/ultralytics/issues) and [discussions](https://github.com/orgs/ultralytics/discussions) and found no similar questions.
  
  
  ### Question
  
  Thanks for this nice feature to have the option to embed the nms in the backends.
  
  If I understand the source code correctly, there are now there two different methods of doing the nms:
  - normal NMS: using non_max_suppression in utils/ops.py
  - NMS export: using NMSModel.forward in engine.exporter.py
  
  Questions:
  - Is it to be expected that both methods will give exactly the same results?
  - What is the (technical) reason that non_max_suppression is not used for NMS export?
  
  Please enlighten me.
  
  
  ### Additional
  
  _No response_