From NCBI site:
this is the complete list until now of Acinetobacter baumannii genomes :
A.baumannii AB0057 : 4050513 nt.
A. baumannii ATCC 17978: 3976747 nt.
A.baumannii AYE: 3936291 nt.
A.baumannii ACICU: 3904116 nt.
A.baumannii AB307-0294: 3760981 nt.
A.baumannii SDF : 3421954 nt.
I have compared two genomes each time and in descending order by MAUVE software:
