-psm vs tessedit_pageseg_mode

[Michael Bradley]

I am running Tesseract v3.04 command line on a sample image and when I run

tesseract INFILE OUTFILE -psm 6 

I get pretty good results.

I wanted to turn this into a config variable so I tried

tesseract INFILE OUTFILE -c tessedit_pageseg_mode=6

and got a very different result.

I thought that -psm and tessedit_pageseg_mode were the same thing.

Can someone explain why I am getting different results?