The best replacement for note 10.1 is nexus 10.

The best alternatives to note 10.1 are rated as following:
★★★★★  nexus 10
★★★★  ipad air
★★★★  note pro
★★★★  tab 3
★★★  tab pro 10.1
★★★  galaxy tab 10.1
★★★  note 2014
★★  note 8
★★  surface pro
★★  ipad 3
★★  12.2
★★  samsung galaxy note 8.0
★★  note pro 12.2
★★  ipad 4
★  surface pro 2
★  apple ipad
★  galaxy tab 3
★  surface 2
★  samsung galaxy tab 10.1
★  galaxy tab 2
★  samsung galaxy tab 2 10.1
★  ipad 2
★  8.0
★  samsung tab 10.1
★  tab
★  new ipad
  asus tf700
  microsoft surface
  tab 2
  ipad with retina display
  note 8.0
  apple ipad 3
  galaxy tab 2 10.1
  tab 10.1
  samsung galaxy tab 2

Your alternative for note 10.1 is not listed? Suggest!
Speaking about note 10.1, one probably shouldn't forget about s pen.

Other search terms related to note 10.1 and their ratings are:
★★★★★ s pen
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note 10.1
nexus 10
ipad air