The technical specifications of the A2000 are very similar to the A500. The difference was that the A2000 had five "Zorro" proprietary expansion slots, two 16-bit ISA slots, two 8-bit ISA slots, a CPU upgrade slot, and a battery-backed clock.
The A2000 came in a larger desktop case, with a separate keyboard like on a PC, instead of the all-in-one "wedge" of the popular low-end Amigas.
Commodore UK sold a version of the A2000 that came with two floppy disk drives and no hard disk as default, which was sold as the A1500, but otherwise was identical to the A2000.