Motanewbie, I can only speak for the Arona and it is a 1l engine apart from an FRSport which comes in 1l or 1.5l.
I bought my partner a 1l FR Sport and we took delivery on Leap day in February. Because of lockdown and my heart attack, she has only done 850 miles but I can say it’s a great wee car.
The engine is very responsive, nippy and the car handles well. It’s comfortable and well equipped and we got it in the metallic Desire Red with grey roof in Automatic.
This is actually the second Arona I have bought. My daughter had returned from the USA and I bought her one just when they were launched December 2017. Unfortunately 2 years later she moved back to the States and I went over to England and drove car back to Ulster where we traded it in for the new one. It was comfortable, safe and nippy enough to travel the 250 miles to the ferry.
I would highly recommend it and don’t worry about 1l engine, more than sufficient.