Dose anything like geekbench scores (for computers / CPUs etc) exist for speakers ?

?? No idea what geek bench is but I’m going to guess it’s a test of actual CPU data. How would you do such a test on speakers when the quality of a speaker is, in large part, entirely subjective and subject to many variables.

There are WAY to many parameters to look at when 'scientifically' evaluating a speaker. So most any reviewer is not going to cover it all. It is literally 10x more work than any CPU testing. AND don't forget it takes a LOT of specialized equipment - Ten's of thousands of dollars in testing equipment, for all the parameters.

Let me start with the statement from your other thread. You were asking about the low frequency response between 2 speakers. One had a lower number listed than the other.
When a manufacture tells you a frequency from 31Hz - 20kHz. That is meaningless. How much variation is that? The speaker out of my phone can do that, if we are talking +5/-20dB variation. Without a dB variation, that number is useless. Also, most all those numbers are measured at 1watt. At rated power, those numbers can change, especially the low frequency.
And even with those 3 parameters, it still doesn't paint you a full picture of the response. What is ideal is a 'speaker response graph'. It shows you what the exact response is at every frequency.

Frequency response is just 1 of several parameters to look at. There is resonance. A speaker 'waterfall graph' can help show resonance (or ringing as it is sometimes referred to) and different frequencies. This is a major part of sound quality is a speaker system and a waterfall graph is very rare to ever come by.

The speakers total THD%. Again a parameter you very rarely see published. The typical numbers are much higher than any electronic device has (it may surprise you).

Off-axis response: how good does the speaker response do off-axis. And off-axis vs. output. Depending on the room, placement of speakers, etc. you may want to choose one type of speaker over another.

There are many other parameters but most could be bundled under one of the above performance topics.
As you can see, unless someone has a factory with a sophisticated testing facility, it would be a daunting task to do speaker evaluations at a scientific level.
The speaker manufacture themselves do all this for their models but again, much of this information is not given or available to the public (or dealers).

Hope this helped.

Some reviewers think they're the equivalent of this, but no. I have even seen reviews that ended with QED, which is, well, use your own adjective.