One is not better than the other. One can dissipate more power than the other.
One, you need to purchase 2000 pieces. The other, you can buy as many as you need.

I understand that it will be good no matter which one I choose. My main concern is whether the resistor type is good. Or do you recommend something else?

 

What do you mean by “resistor type”?
Are the two types different?

 

will it function well as a replacement for Z552

 

Z551/Z552 are 0.22 Ω emitter power resistors. The resistor provides a number of functions.

1. Limits the current through the power transistor
2. Raises the voltage on the emitter of the transistor, reducing the base-emitter bias voltage
3. Shifts the operation mode from Class-B towards Class-AB, reducing cross-over distortion
4. Provides negative feedback and temperature stability, improving linearity

3 W power rating is underrated. 5 W power is an improvement.

5 W power dissipation will occur with 5 A through a 0.2 Ω resistor, using the formula,
P = I x I x R

5 A into an 8 Ω speaker is 200 W.

In other words, the resistor has to dissipate 5 W when driving an 8 Ω speaker at 200 W.

Edit:
3.5 A into an 8 Ω speaker is 100 W
3.5 A into a 0.22 Ω resistor 2.7 W.
3 W resistor will work, 5 W gives extra headroom.

 

Thank you for the valuable information.
I'm adding a few items to my shopping list: https://www.digikey.com/en/products/detail/te-connectivity-passive-product/SQPW5R22J/2365728