It really comes down to where you put the term "career" on a scale that has "stat line" on the left and "life" on the right. It is a matter of interpreting the somewhat ambiguous word "career."
No, career pretty much sums up what their accomplishments were during the time they "worked." Driver got a ring during the last years of his career and put up solid numbers during. He played for the same team the whole time, which counts for something but not a lot. He was able to play with a HOF QB for a majority of his career and switched to a possible future HOF at the end of it.
Moss put up incredible numbers during with no ring. He played for many different teams and achieved statistical success with a wide variety of QBs and offenses. He caught TD passes from illustrious QBs such as Spergon Wynn, Andrew walter, Kerry Collins, Jeff George, and Matt Cassell to name a few.
One's going to the HOF, the other is a local favorite by his team's fans. When you look at their careers, Moss wins hands down.