I swapped the springs to my Cherry G80-3000LQC keyboard. It has PCB mounted switches and it was easy to keep both springs at the same time for some tests. For me these 62g korean gold spring are not too different from the original one.
I am the only one in the world who do not feel a big difference between these two cases.

To replace 104 keys I spent more than 50% of the cost of a new Cherry G80-3000 keyboard. I think it was not a big deal for me...
I summarize what various users have written:
I have new MX Brown and they are A LOT lighter than my 62g k. springs...
I think that my originals MX Clear springs, 10 or more years old, where much more lighter than NEW Clear springs.
I checked the DeskThority Wiki here but not found anything about old Clear springs. I clearly remember that, when I bought my keyboard, the MX Clear were rated at 65 cN, like today.
If Cherry has changed something, I don't know.

I am writing now these rows with my Cherry G80-3000 with gold korean 62g springs. The feel I get is a LOT different from new (2014) MX Brown: more rubber-like and less "clicky" than Browns. And the actuation force is bigger.
In the next days I hope to get a new G80-3000 MX Blue from Germany and I want to try also these Blue springs to see what changes... I will update this topic. Sorry for bore you...

P.S.: I just changed main keyboard from IBM Model M to this Cherry G80-3000. Feeling is less fatiguing but also less satisfactory. I think it is impossible to compare these two keyboards. Too different. IBM Model M is better for my ego, MX Ergo Clears are better for my fingers...
My original first message is here.