Marantz 2230 vs Harman Kardon 430 Twin - Curve vs Flat... which sounds better?

For the audio clips each receiver is set to 75db at 500hz. The audio clip is then recorded from the speaker outputs (main speaker outputs) through a speaker amp to headphone converter. Recording is at the PC using the built-in microphone jack. Amplifiers/Receivers selected on following criteria: 1. Phono Input 2. Cost less than Marantz 2230 3. NO remote required to operate 4. Common brand names Listening conditions: 1. All amp/receivers set to 1/2 max volume 2. Tone controls neutral or off 3. Volume controlled by streaming device 4. Listened to on upgraded 1980 La Scala 5. A/B listening twice through entire set Listening set: ("Test-songs-Andy's-audio-krapp") https://youtube.com/playlist?list=PLpgpV22iouA6d7O22d2IlXoN15bjJOjUC&si=TdVGgyiOZjogzRtQ Music: After You, by Dan Lebowitz