The increase in battery size it pretty hard to ignore.
But IMO, it's not clear if it's a real increase at higher freeway speeds.
What I see in the specs is that there is a larger gain of going slower than there was before. The difference at 80 MPH on the new battery and old is far from being clear. I do not doubt the big increase of low speed range. But I like my SS9 for higher speeds and there is it not real clear how large of an improvement (if any) the new battery is.
After the new battery becomes commonly used on the road, I will be checking here to see what the increase really is in freeway range (above 70 MPH). If it is really a reasonable increase, I too will be looking for an upgrade. I really do NOT care about the low speed range of the SS9, and that is where it is a 100% increase by their specs. My SS9 is mainly for the freeways. I use the Zeros for slower stuff.
Also, the older battery charges a little faster than the new.
I will wait until the bike with the new battery is common on the road before making any decisions.
-Don- Payson, AZ (RV)