More test and my conclusion:
I test with the Brother mfc2720dw with linux ppd, in 3 resolutions 300,600, and HQ1200 dpi, without problems with Courier Bold. Only in 2400x600 that is HQ1200 the text is more large that width.
The ae.exe editor with courier new have a bug (i am not sure but i think that)
The windows ppd are generic, or incomplete. Why?, In the brother mfc2720dw the windows ppd HQ,is 1200x1200, in linux is 2400x600. If in linux work ok in all resolutions,the linux config is right.
In the xerox6500n, the windows ppd, do not have any about security, user, passw, etc. but in linux ppd that is complete especific for this printer. And work ok.
Saludos