May 1, 2012
Thanks for your inquiry. This is Alison at GE. I am happy to assist you.
The GHWN4250DWW has a hydrowave wash system, the GTWN4250WS does not.
The GHWN4250DWW offers Power Rinse, Auto Soak, Extra Rinse and a Basket Clean cycle the GTWN4250DWS does not offer these cycles.
Model GTWN4250DWS offers a prewash cycle and The GHWN4250 does not.
GHWN4250DWW offers a rain shower system. The rain shower system save energy and money. Rather than a washtub full of water, every load of laundry gets three "showers", rinsing clothes clean while minimizing water usage. The RainShower rinse system uses less water, providing rinse performance similar to a high-efficiency washer.
I hope this information is helpful.
Please let us know if you have any further questions. We are always glad to help.
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