Attached here are four aircraft registered in the USA, N804PF, N336XL, N885BB (all with liveries based on a previous Argentinian repaint, LV-CBK, which is also here having had a minor modification to the engine livery).
There's also a different livery pattern, on N1867M.
Some of these aircraft may have moved on, my checks suggest that they are current. N804PF used to be operated by Delta Private Jets, which is now absorbed into Wheels Up, so there may have been ownership changes over time. So, 5 liveries, 4 US and one Argentinian that is a revision.