Which black cat do you have that isnt the correct width?
jester.
You will gain bat speed at that weight but you will lose blade mass as well which may reduce the value for shots.
Always found what you gain in bat speeds is more beneficial than what you lose in blade mass if you get your timing right.
Clearly force = mass x acceleration, so there is an optimal weight for everyone, it is about finding it. Heavier for drives and swing weight, lighter for pulls and cuts.
So the long handle CA I currently own that's the same length as a standard Short Handle and 102mm wide isn't a narrower face or a shorter handle? Okay...
For me there is also the consideration of perhaps getting into a better position in the first place with a lighter bat. When I face quicker bowlers or swinging balls I sometimes find myself unable to adjust quickly enough. Possibly psychosomatic but worth a try I think.