I would find 125 cc too small.
I understand that, the cub has about half the hp of a RE 350 but less weight so tops out around 55mph.
And real world fuel figures of 140mpg+(UK).
But it is like a moped/motorized bicycle where the R.E is definitely a motorcycle, then there's the R.Es exhaust note........
But both appeal to me in slightly different ways though they both tick the boxes I'm after-
Fun to ride.
Very economical.
Reliable (the cub is 10/10, I'd like to think the R.E Hunter is going to close, OK maybe not 10/10 but is looking promising so far).
Longevity.
Smaller than what I've had for years.
Good for commuting/shops.
Both can tour (yes they can!)
Both can be bought new (very little else on the market similar).
Different (from most other bikes on the road).
Home servicing/fixing (-1 for the Cubs smart key but hopefully it'll be Honda reliable).
There are other bikes but generally when built down to a price point are powered by "clone" engines, even from well known name manufacturers, while these may be fine in long run only time is gonna tell....