It looks like some of the heists have a "pro" version. Pro jobs are glowing red on the crime.net's map and seem to feature better rewards.
So far I only tried the pro version of Bank in which you have to steal gold instead of dollars. Gold being heavier, your speed is quite reduced while carrying the bags, making the mission more difficult.
Regarding the gameplay itself, is it the only difference with the "regular" mission ? What are the differences in the other "pro" missions ? Are there any prerequisite to get access to these pro jobs ?