In those applications there is little to no difference -- just the way it's expressed.
Joule is a unit of energy (i.e. it takes 1 joule of energy to exercise the force of 1 newton for a displacement of 1 metre).
In electronics it related to Watts as follows:
1 joule= the equivalent of 1W of POWER per second required to produce 1Watt in one Second. Similarly, Watt is the product of amperes times volts (voltamperes).
Basically, you can look at a power supply's watt rating and be just as well informed. Much of the stuff you see is mumbo-jumboed to sound more scientific and different, and, thereby, more luring than it actually is.
Joule is a unit of energy (i.e. it takes 1 joule of energy to exercise the force of 1 newton for a displacement of 1 metre).
In electronics it related to Watts as follows:
1 joule= the equivalent of 1W of POWER per second required to produce 1Watt in one Second. Similarly, Watt is the product of amperes times volts (voltamperes).
Basically, you can look at a power supply's watt rating and be just as well informed. Much of the stuff you see is mumbo-jumboed to sound more scientific and different, and, thereby, more luring than it actually is.