Onkyo TX-SR343 vs Harman Kardon AVR 1510 comparison definitely makes sense.
Considered AV receivers have the same number of channels 5.1. Regarding power, then TX-SR343 has such a W/Ohm ratio - 100/6 when AVR 1510 has a power of 75/8, 75/6. The THD is 0.08% for the TX-SR343 but 0.09% for the AVR 1510.
Characteristics of digital to analog converter (DAC) are different, TI Burr-Brown 192 KHz/24-bit for TX-SR343 and 192 KHz/24-bit for the AVR 1510. None of the models support Bi-amping. Sound transmission directly to the amplifier in Pure direct (straight) mode is not implemented in these models. None of the competitors supports Auto speaker calibration.
Both models do not have WI-FI support. Only the TX-SR343 has Bluetooth support. Each of these units does not support Apple Music. Competitors do not have built-in Spotify service.
HDR is not available on each model. Compared AV receivers retain the quality of 4K/60Hz signal when transmitting from a source to a TV or projector. HDMI signal transmission in standby mode is implemented in each of the devices. Both competitors are not able to scale the HDMI signal. The HDR standard - Dolby Vision is not supported by these receivers.
Each receiver has 4/1 HDMI inputs/outputs. The HDMI Audio Return Channel (ARC) feature supports both devices. Unfortunately, HDMI eARC is not available on monitored devices. Of the two receivers in our comparison, HDMI CEC is present in only the TX-SR343. Both models support the standard HDCP 2.2. Receivers do not have a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is not present in each of the AV receivers. Unfortunately, the setup assistant is not available in each of the models.
None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.