The best replacement for comparator is comparable.

The best alternatives to comparator are rated as following:
★★★★★  comparable
★★★  op amp
★★  comparable java
★★  opamp
★  comparable javarevisited
★  cmm
  comparable in java
  schmitt trigger

Your alternative for comparator is not listed? Suggest!
Speaking about comparator, one probably shouldn't forget about hysteresis.

Other search terms related to comparator and their ratings are:
★★★★★ hysteresis
★ minecart chest
You have in mind a companion for comparator and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of comparator in all years. Click on graph for more.
comparator
comparable
op amp