Re: @pip25 ... Oh, come on
Prosecutors have great discretion as to what charges the file for any particular crime. So one offender might get say a year in jail for a given crime, and another identical crime might be charged differently, and a lengthy sentence, in some cases, be mandatory.
As 90% of people that go to trial in US Federal courts are found guilty, one is almost forced to plead to something to avoid at least some prison time, even if not guilty. The government also has unlimited resources while defendants have to pay for an attorney with real money. Oh yeah, "if you can't afford an attorney, one will be provided for you." You get exactly what you pay for.