Well, the pros of a rosin press is the lack of any solvent. The con is the price point to purchase a decent press.
The Source is going to use a solvent to extract the goodness from your herb, then you can recover most of your solvent and use the extract.
Depending upon methods, your solvent extract may tend to hold more of the waxes and fats that gunk up traditional extract atomizers. Rosin extraction is less labor intensive, but the end result also can tend to run "rough" in conventional wax pen set ups. Pressing rosin takes very little time from start to finish. Using solvent to extract is a more laborious task, but can yield fantastic product as well.
Hope I gave you some points to ponder.....by the way, I have an old school Isomerizer and a Rosin press. They both can make good things better.