The difference between Yeedi K600, K650 and K700 smart cleaning robots are as follows:

• Robot Type
  The Yeedi K600 and K650 are vacuum only cleaning robots whereas the K700 is vacuum and mop 2-in-1 machine.
• Mapping and Cleaning Pattern
  The K600 and K650 do not have mapping ability, they clean in a random pattern which is optimized for carpet cleaning.
  While the Yeedi K700 robot vacuum has camera mapping, it can map its surroundings, and move in a programmed zigzag path for better coverage, and clean more efficiently than random cleaning pattern.
• WIFI Connection
  The K650 supports WiFi connection whereas the K600 and K700 cannot connect to a WiFi network.
• Control
  The K600 and K700 come with a remote control and you can use the remote control to control the robots, whereas the K650 does not have a remote control, you need a smart phone and WiFi connection to use all its functionality. The K650 also works with Alexa and Google Assistant, allows you to use voice commands to control the robot.
• Schedule
  The K650 allows you to set up scheduled cleaning to avoid high traffic time, whereas the K600 and K700 does not have the scheduling function. The K650 scheduling function does not support edge cleaning mode.
• Dust Bin Capacity
  The K600 and K700 have a 600ml dust bin whereas the K650 has a bigger one that holds up to 800ml.
• Climbing Threshold
  The crossing height of K600 and K700 is 0.63-inch whereas the climbing threshold of K650 is 0.71-inch.
• Boundary Strip Supported
  The K650 support boundary strip, you can use boundary strip to stop it from entering restricted areas. Whereas the K600 and K700 do not support boundary strip.
• Max Suction Power
  The K600 has a max suction power of 1800pa versus 2000pa on the K650 and K700.
• Main Brush
  The K650 uses tangle-free silicone main brush which cleans pet hair effectively whereas the K600 and K700 use a V-shaped nylon & rubber rotating brush to pick up dust, dirt and large debris from carpet and hard floors.
• Run Time
  The K600 runs up to 110 minutes per charge, the K650 runs up to 130 minutes, while the K700 runs up to 110 minutes when vacuuming and up to 250 minutes when mopping.

Similarities:

• Self Docks & Recharges
  When the cleaning cycle is complete or battery gets low,
  the robots automatically returns to the charging dock.
• Warranty
  Carry one year limited warranty.
• Control Panel
  All of them use button control.
• Clean Modes
  All of them have Auto Cleaning mode, Edge Cleaning mode and Spot Cleaning mode.
• HEPA Filter
  All of them have HEPA filtration to capture large and tiny particles.
• Anti-Collision
  They have Anti-Collision sensors to avoid bumping into furniture and other obstacles.
• Drop Sensor
  They have Anti-Drop sensors to prevent falling.
• Side Brush
  Two side brushes to help gather dust and debris.
• Charging Dock
  Come with a charging dock that allows the robot to dock and recharge itself automatically.
• Cleaning Tool
  Come with a multi-function cleaning tool to help clean the robot.

Download the manuals to learn more:
Yeedi K600 Manual
https://site-static.yeedi.com/upload/us/manual/yeedi-k600/yeedi-k600-User-Manual-US.pdf
Yeedi K650 Manual
https://site-static.yeedi.com/upload/us/manual/yeedi-k650/yeedi-k650-User-Manual-US.pdf
Yeedi K700 Manual
https://site-static.yeedi.com/upload/us/manual/yeedi-k700/yeedi-k700-User-Manual-US.pdf