Hey Paul,
I have test ridden the Like 125, but then ordered and bought blindfolded (without testriding) the 200i.
The riding feeling/handling is exactely the same, also brake feeling. Also the carburator engine of the 125 works well, is responsive and seems not really much weaker than the 163cc engine. The big advantage of the 125 is the kickstart option in case of a dead battery. With the 200i you must always have a reliable battery and a working startermotor. There is no kickstart option on the 200i.
If you are riding just in town or not much out of town with higher speeds or more often as a single rider, the 125cc should be good enough.
The 200i gives you about 15-20km/h more Topspeed, which might be interesting for longer rides out of town on freeways or so. Also if you want to ride with socius more often.
I just bought the 200i, because I had the driving licence for it and I loved the idea of the fuel injection and I wanted to have some torque and speed reserves for riding out of town. Also the milage is a bit better than with the 125 carburator model. And the injection models start just fine and instantly always. The downside might be the throttlebody electronics and its reliability. But I had no issues with it so far for two years now.
So, if I had to choose again..., ...undecided, but I might get the 125 and maybe put in a 170cc bore kit.
So, greetings to the Ubuntu Land of Micheal Tellinger!