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Probably the biggest difference is the 4 supports 4K and will upscale 720P and 1080P content to 4K SUHD. The 3 will not. Big difference on my Samsung TV. They also improved the remote control a bit. I purchased the 4 to replace a 3 I had for the up-scaling capability.
Sorry, there was a problem. Please try again later.Roku 4 has 4k compatibility.
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