OO-THB, TNT's second frame is currently testing at BFI
in full TNT colours. Although strong rumours are that these frames will be repainted into EK
colours at a later moment. Don't know about their 3rd frame, which is not yet produced.
In fact, the lease will make handling their cargo much more easier and less complicated then it is now! It's just not very handy to work with USA registered aircraft and airline companies (Atlas Air). Especially the restrictions for the transport of dangerous goods is sometimes difficult and almost not understandable for their customers (who don't realize about US regulations when they book on a UAE carrier).
Now, they will deal with Dutch and Belgium regulations if the cargo will fly on a TNT registered aircraft, regulations which are much less complicated