FamilySearch announced on it's listing of United States databases that their 1790 census has been updated. I'm not certain how much updating took place, but out of curiosity I looked for James Rampley of Harford County, Maryland.
I then compared the FamilySearch image for James with the Ancestry.com image. These images have not been modified and were created by taking a screen shot and pasting that into a graphics program.
James is written as "Jms" on the census itself. The FamilySearch image appears to be a little easier to read, but that may be really subjective.
How often do you look for an image of a record on more than one site?
And does your citation indicate which website you used? This is one reason why we indicate the website the image was obtained from--even if the images were of the "same" record.