I think the Enterprise are disadvantaged in sizecoding when compared by other systems which are have a fixed hw and sw enviroment. On EP need a EXOS file header, build LPT table, setup memory...
At bigger size categories these will made less disadvantage. And some natural limits on EP: 512 bytes (one sector size), 1024 bytes (one cluster size on standard 720K disk), 4096 bytes (one tape block), 16144 bytes (maximum size of header 5 program when only Page 0 used), 48912 bytes (maximum size of header 5 program)