The main difference between the Tineco A10 and A11 series is the motor, battery and dust cup capacity.
(Tineco A10 Series:Tango,Hero,Spartan,Dash;
A11 Series: Hero,Hero EX,Master Plus,Tango)

• Motor
  The Tineco A11 series have a 450W motor which generates up to 120W suction power whereas the A10 series has a 350W motor which creates up to 110W suction power (except A10 Dash which has a 300W motor that produces up to 90W suction power).
• Battery
  The A10 series feature 2000mAh battery which runs up to 25 minutes on regular mode and 10 minutes on Max mode, whereas the A11 series have a 2500mAh battery which runs up to 40 minutes on regular mode and 12 minutes on Max mode (except A11 Master and Master Plus which have 2000mAh battery, but they come with two batteries to run up to 50 minutes).
  Please note that the A10 Dash model has a built-in battery whereas the others have a detachable battery.
• Bin Capacity
  The A10 series dust cup holds up to 40ml versus 60ml on the A11 series. Larger capacity means less empty required.
• Weight
  The A10 series is a bit lighter than the A11 series.
  The A10 series vacuum main body weighs 2.87 pounds versus 3.3 pounds on the A11 series.
• Storage & Charging Dock
  The A10 series old packages come with a single charging floor storage Dock or a single charging wall mount dock, but it seems that some new versions come with a dual charging wall mount dock; the A11 series come with a dual charging, (the A11 Master used to come with a floor charging dock).
  Always double check what types of dock are included by contacting the seller before buying.
• Accessories
  The vacuum models within Tineco A10 series and A11 series come with different accessories.
  You can read comparison of the Tineco A10 series and the difference between Tineco A11 series models here.

If you want one with the most accessories, you can consider the A11 Master Plus; if you want one with an extra battery, you can consider the A11 Hero EX, Master, Master Plus; if you want longer run time, you should buy the A11 models; if you want more powerful suction power, buy the A11 series.

Similarities:

• They are cordless, powered by rechargeable lithium ion battery.
• Bagless, have a dust cup that can be emptied by pressing one button.
• They have cleaner head that can handle multiple floor types, the motorized brushroll has no brush off control, you cannot turn it off when cleaning hard floors.
• They have regular and boost suction modes.
• They have trigger type of power control like Dyson cordless vacuum, but also add a lock for continuous cleaning with no need to keep holding down the trigger.
• Nozzle have LED headlights.
• Come with a straight wand which is not telescopic.
• Recharge time is approximately 3 to 4 hours.
• 4 Stages Full Sealed Filtration System to help
  capture and trap 99.97% of particles and emit non-allergenic air.
• Carry 2-year limited warranty for the vacuum, 1 year limited warranty for battery.