Same TVs but with different model numbers 6400 and 640D.
The main difference in the design of the model 640D has a frame around the screen colors (Dark Titan), 6400 (Black).
Slightly different sound processors, but it does not matter. Televisions otherwise identical.
Comparative table TV JU6400 and JU640D
| SERIES | JU6400 | JU640D |
| Design | ||
| TYPE | 4K UHD TV with Full Array Backlighting | 4K UHD TV with Full Array Backlighting |
| STAND TYPE (COLOR) | Square Stand (Black) | Square Stand (Dark Titan) |
| Video | ||
| SCREEN SIZE | ||
| RESOLUTION | 3840 x 2160 | 3840 x 2160 |
| MOTION RATE | 120 | 120 |
| PURCOLOR (COLOR ACCURACY) | Yes | Yes |
| UHD UPSCALING | UHD Upscaling | UHD Upscaling |
| Audio | ||
| DOLBY | Dolby Digital Plus | Dolby MS11 |
| SOUND EFFECT | DTS Studio Sound | DTS Studio Sound |
| DTS PREMIUM SOUND | DTS Premium Sound 5.1 | DTS Premium Sound 5.1 |
| SOUND OUTPUT (RMS) | 20W (10W x 2) | 20W (10W x 2) |
| SPEAKER TYPE | Down Firing + Base Reflex (2CH) | Down Firing + Base Reflex (2CH) |
| Wireless Connectivity | ||
| WI-FI | Built-in Wi-Fi | Built-in Wi-Fi |
| WI-FI DIRECT | Yes | Yes |
| Features | ||
| SMART HUB | Yes | Yes |
| PROCESSOR | Quad-Core | Quad-Core |
| APPS PLATFORM | Smart TV with Apps and Full Web Browser | Smart TV with Apps and Full Web Browser |
| SMART EVOLUTION READY | Ready (Future Proof Only) | Ready (Future Proof Only) |
| ULTRA CLEAR PANEL | Ultra Clear | Ultra Clear |
| DIMMING TECHNOLOGY | UHD Dimming | UHD Dimming |
| CONNECTSHARE™ | Yes | Yes |
| ANYNET+™ (HDMI-CEC) | Yes | Yes |
| BD WISE™ PLUS | Yes | Yes |
| CLOSED CAPTIONING | Yes | Yes |
| ELECTRONIC PROGRAM GUIDE (CHANNEL GUIDE) | Yes | Yes |
| V-CHIP | Yes | Yes |
| ECO SENSOR | Yes | Yes |
| Inputs & Outputs | ||
| HDMI | 3 | 3 |
| USB | 2 | 2 |
| ETHERNET | 1 | 1 |
| COMPONENT | 1 | 1 |
| COMPOSITE IN (AV) | 1 (Common Use for Component Y) | 1 (Common Use for Component Y) |
| RF IN (TERRESTRIAL/CABLE INPUT) | 1/1(Common Use for Terrestrial) | 1/1(Common Use for Terrestrial) |
| DIGITAL AUDIO OUT (OPTICAL) | 1 | 1 |
| AUDIO OUT (MINI JACK) | 1 | 1 |
| RS232C | 1 | 1 |
| System | ||
| DTV TUNER | ATSC / Clear QAM | ATSC / Clear QAM |
| Accessory | ||
| REMOTE | Standard Remote Controller (TM1240A) | Standard Remote Controller (TM1240A) |
