Which one is a better Sump Pump

I am in need of a new sump pump and I would like to know which on is the best of these RIDGID Model # 500RS 1/2 HP Cast Iron Submersible Sump Pump or Basement Watchdog 0.5-HP Cast Iron/Cast Aluminum Submersible Sump Pump Model #: BWT050 at Lowe's and the Barracuda 1/2 HP Cast Iron Sump Pump Model Number: 6913209 from Menards.