The best replacement for 6.3 is 5.8.

The best alternatives to 6.3 are rated as following:
★★★★★  5.8
★★★★  3.5
★★★★  5.5 amg
★★★★  note 2
★  6.2
★  grand 2
★  mega 5.8
★  note 8.0
★  note 1
  5.9
  galaxy note 2

Your alternative for 6.3 is not listed? Suggest!
Speaking about 6.3, one probably shouldn't forget about war commander.

Other search terms related to 6.3 and their ratings are:
★★★★★ war commander
★★ farmville 2
You have in mind a companion for 6.3 and it is not yet here? Propose!



Google Trends

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6.3
5.8
3.5