Motocaddy S3 vs M1 | Golf Monthly

actually I've been looking at these.
Hard to see difference S1 DHC vs S3 Pro?

Also Powkaddy do some brilliant winter wheels.
But seems you can't buy any with winter wheels already on it/included.
Can't get why they don't just do one all season wheel?

anyone got any reasons why Motocaddy not Powakaddy or vice versa?