Different tracker programs one shows the plane tail number & the other shows (?-? T206) which indicates it is unidentified Cessna turbo 206.
Trackers frequently show 'unidentified' or have missing data because it has not updated or is waiting to update or refresh. Sometimes it is because owner/operator has not entered some specific info into the system or they are using a low-spec ADSB unit that has more limited capabilities so cannot show all data.