I think a bunch of the differences between PSA and PDT are going to be going away here shortly.
Both will probably have PHL and CLT bases
Both will have closer flow timelines for new hires. (Piedmont Expansion will make it shorter for folks on property as flow slots are increased... we’ll have to see the new PSA flow language to get a more accurate comparison).
Both will lose their current scheduling in favor of PBS.
ERJ vs CRJ: Meh who cares.
Differences will likely be personality driven. The recruiting and training department mentalities between the two are vastly different. PDT tends to put more effort into screening folks who will be successful and its training Department works to make sure they get through training as long as they’re improving... PSA tends to take everyone (including folks PDT gives a TBNT to) and put them into training and has no qualms firing Half of a new hire class before their check ride.
Pick the place that feels right.