The Sony STR-ZA3100ES vs Onkyo TX-SR343 comparison shows that these AV receivers have some important differences and common features. The STR-ZA3100ES has 7.2 channels amplifier and the TX-SR343 5.1 channels. Only the STR-ZA3100ES has a Dolby Atmos support. DTS:X is supported only by the STR-ZA3100ES. We have evaluated both AV receivers, STR-ZA3100ES has an overall score of 6.3 out of 10 vs 4.3 out of 10 for TX-SR343.
The Sony STR-ZA3100ES is better receiver in this comparison. Check Sony STR-ZA3100ES price