Roku Premiere (4620) vs Roku Ultra (4800)

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

Premiere (4620) compared with Ultra (4800)
RokuPremiere (4620)RokuUltra (4800)
Overview
ReleasedOctober 2016October 2020
Video and audio
Resolution4K4K
HDRNoneHDR10, Dolby Vision and HLG (better)
Dolby Atmos–Yes
Video4K UHD up to 60 fps; HDCP 2.2; upscales 720p/1080p to 4K and 720p to 1080p (Roku launch release reproduced by Display Daily)Up to 4K at 60 fps; Roku's model-4800 guide specifies an HDCP 2.2 HDMI connection for 4K
HDRNo HDR in Roku's exact Cooper/4620X developer row and original launch release; distinct from the later HDR-capable Premiere with model number 3920Roku's current Benjamin/4800X developer row lists HDR10, Dolby Vision and HLG. An older model-4800 support document also claims HDR10+, which the developer row omits; HDR10+ is left out of the main field pending reconciliation
AudioNight listening mode adjusts sound levels for consistent volume (Roku launch release)Dolby Atmos with compatible content and sound system; TechRadar lists AAC, MP3, WMA, FLAC, PCM, AC3/EAC3, DTS and ALAC support
Performance
SoftwareRoku OSRoku OS
Chip detailsArm Cortex-A53 quad-core at 1.2 GHz; OpenGL ES 2.0 (Roku's exact Cooper/4620X developer row)Quad-core processor (Roku launch announcement); Roku's Benjamin/4800X developer row identifies Arm Cortex-A55
Memory1 GB (Roku's exact Cooper/4620X developer row)2 GB (Roku's Benjamin/4800X developer row)
Software and servicesRoku OS; apps and features vary by region and software versionRoku OS; OS 9.4 was announced alongside the player. AirPlay 2 and HomeKit were added after launch, as confirmed in Tom's Guide's review; apps and features vary by country and software version
Connections
Wi-FiWi-Fi 5Wi-Fi 5
EthernetNoYes
Voice remoteNoYes
PortsHDMI output and power input only; no Ethernet or microSD card slot (The Gadgeteer)HDMI, USB, Ethernet and power input (model-4800 Quick Start Guide); no microSD slot (both reviews)
Wi-Fi and BluetoothDual-band 802.11ac MIMO (Roku launch release)Dual-band 802.11ac (TechRadar); Bluetooth support and up to 50% greater wireless range than the prior model (Roku's launch claim)
Smart home–Controllable through compatible Amazon Alexa and Google Assistant devices; AirPlay 2 and HomeKit support with updated software
RemoteOriginal infrared remote with navigation, playback and app shortcuts; no microphone or headphone socket. Mobile-app voice search is separateOriginal voice remote has TV power, volume and mute, headphone jack, two personal shortcuts and lost-remote finder; two AA batteries. Later rechargeable-remote bundles are not separate player hardware here
Design
TypeBoxBox
Power–Supplied mains power adaptor
SizeApproximately 5-inch-square black box (The Gadgeteer); original box includes remote, two AAA batteries and power adapter4.9 × 4.9 × 0.9 in (Tom's Guide)
In the box–Ultra player, voice remote, headphones, two AA batteries, Premium High Speed HDMI cable and power adaptor

More comparisons