Here are some questions you should be considering...
How many of each machine type are actually installed and being used in the market?
What is the local support in your area from each vendor? Where are their spare parts warehoused?
What is the warranty period? What is the on-site training period, and after hours support?
Go to each supplier with some sample boards and data and see what actual results they are getting for your boards.
Take some of your most complicated components and see how they handle them in front of your eyes.
Have them show you the basic programming and then you can see for yourself which you like.
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