Projected difference in sound between Harman Kardon 990, and Harman Kardon AVR 3550

[rwnano]

What would the perceived differences in sound at similar volume of music, from the same bookshelf speakers – Focal Chora 706 be:

between

a Top of the line Stereo Amplifier from harman Kardon – Harman Kardon 990 -

https://www.stereophile.com/content/harman-kardon-hk-990-integrated-amplifier

https://www.hifiengine.com/manual_library/harman-kardon/hk990.shtml

150 watts per channel into 8Ω (stereo)

Weight: 24kg

High instantaneous current capacity of +- 200 Amperes [Two hundred ]

And

2. a mid-fi AVR in two channel model from the same manufacturer – Harman Kardon

Mid Fi AVR being HK AVR 3550 from 2002.

Peak current rating of +- 28 amperes.

RMS Wattage of 65 Watts

https://www.hifiengine.com/manual_library/harman-kardon/avr3550.shtml