How an Open Source ERP distinguished from a commercial one?

Criteria	Open Source	Commercial
Pricing	1. Available at free of cost. 2. Licenses are available along with the  source code.	1. expensive and thus  suitable for big corporations 2.The prices  vary significantly but according to the size of the company and volume of business. 3. Consist of lot of hidden costs.
Flexibility	1 .Companies can do the necessary modifications in code  without much support from the vendor.	1. Difficult to make them suit the working pattern  2. Have to  change business process to suit ERP, without choices
Duration,Dependence   and Results	1. implementation time is very less 2. Complexities can be resolved without vendor    support	1. Take more time to implement 2  .Complexities need vendor support
Training	1. Does not require much training  2. No validity measures for knowledge 3. Gets help support and  from communities	1.  Lots of training is required,which in turn costs  lot of money 2. Training has validity and thus need to update  again providing money
Security	1. More secure since it brings into notice of the user whenever something goes wrong	1.Less secure and vulnerable to attacks