As I recall, the wattage refers to the total wattage of the machine. As a Felix has two motors, and the brush head motor is perhaps 175w, the remainder will be the main motor.
With Sebos generally, the difference between 1100w and 1300w wasn't a thing. The motors were the same. They simply reported the wattages differently under different conditions to align with EU diktat. 1300w was max and 1100w was nominal or some such. In reality, there wasn't a difference between 1100w and 1300w machines.
So with the Felix, the earlier 44186EK motor was I think 890w as later reported, and the 175w head motor brought it up to 1065w so it was under 1100w.
Which is better? On the Felix, I really don't see a difference in use. I've used pre and post 2017 on the shop floor and I cant tell the difference.