What is the difference between the IE-DirectPrint1000 and the IE-DirectPrint500 models of Edible Ink Printers (direct to cake versions)?

Question

IE-DirectPrint 1000

• $15500 for the printer (includes empty refillable cartridges, set of 8)
• Cartridges hold approx. 220ml each
• Refill Pack (200ml each color, 1600ml total): $240
• Refill Ink in individual 100ml sizes: $16.99 or in 1 gallon sizes: $197.99 (multi-item discounts may be available)
• Printable area: 37.5cm x 61cm
• Printable height: Up to 12cm
• Printing time (at 720x720 dpi): 4 minutes to print 0.22 sq meters (37.5cm x 61cm) at 100% coverage
• Dimensions/Weight: 88x88x33cm / 38kg
  
  

IE-DirectPrint 500

• $8500 for the printer (includes refillable cartridges with edible ink)
• Cartridges hold approx. 17ml each
• Replacement cartridges: $100 per set (8 cartridges), or $12.99 individual
• Refill Ink in individual 100ml sizes: $16.99 or in 1 gallon sizes: $197.99 (multi-item discounts may be available)
• Printable area: 31.5cm x 51cm
• Printable height: Up to 10cm
• Printing time (at 720x720 dpi): 3 minutes to print 0.16 sq meters (31.5cm x 51cm) at 100% coverage
• Dimensions/Weight: 63x87x33cm / 25kg