This model (#5338) is the next generation for model #755320, also sold on Walmart.com. In other words, this is the newer version. Not sure if Lasko will eventually phase out #755320, but as of this writing, they continue to sell it. Both tower heaters are almost identical, aside from a couple of minor differences. One difference is that this model (#5338) has "SaveSmart Technology" which can potentially save energy by power cycling while trying to heat an area. Another difference is the appearance of the buttons on the base unit and on the remote. I've had both models, #755320 and #5338, and essentially, there is no difference in their performance. They are the same in size and dimension, they both oscillate, they both put out the same amount of heat, and they are both rated well across the web. Model #755320 has over 500 consumer reviews on Walmart.com because it's older, not necessarily better. Since this model (#5338) is the newer version, I would recommend buying this one due to potential technological improvmements. It's also slightly "greener" and possibly more efficient due to it's power saving mode. By this time next year, I'm sure this model will have over 500 good reviews as well.
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