avensis wrote:Hi, I also want to know how the ultra is better
Besides the wired Ethernet connection, the Ultra has a USB connector, which permits playing media (video, music or pictures) from a directly attached storage device. The Ultra also has 2 GB of operational memory (compared to 1GB for the Express 4K+) and a slightly faster processor, which makes the player more responsive. And it also seems to have a faster WiFi connection, at least compared to some of my older players. I have tested the Ultra 4800 with some fixed bitrate test videos, and it will play up to around 200 Mbps without a problem. It starts buffering with 250 Mbps video. This was tested via the USB connection, so no network bottlenecks to choke the playback.
As to WiFi speed, mine has connected at 230 Mbps to an 802.11ac access point that's about three feet away from the Ultra, so best possible conditions. Considering the Roku is mainly designed for Internet streaming at no more than 30 Mbps or so, the network connection speed (wired or wireless) is more than sufficient for that use. It's only when playing local media from your home network that the wired Ethernet connection might be too slow. But I use an Nvidia Shield for my local playback, which has wired Gigabit Ethernet, so there's no issue there.
