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You have higher potential speeds, with 802.11n. 802.11g = up to 54Mbps, whereas 802.11n can only support up to 700Mbps. Keep in mind, those speeds are best case. The other main thing is that you are more likely to get a strong signal with "n" if it is operating in the 5Ghz radio spectrum. vs, the 2.4Ghz spectrum used by all 802.11g and many 802.11n wireless routers. There are a lot of things that cause interference in the 2.4Ghz spectrum, so you could see a significant improvement if you have a source of interference in your home/office.