Yes, basically, but it is a bit more complex.
I depends upon your weight too, indeed. If you are above 80 – 85kg I would not recommend to go for light engine.
Personally I flew 7 different paramotors with Snap Ego (the same thrust as TOP 80), and few larger engines: Moster 185, Simonini and C-Max. A am 92 kg and I will not go for light engine. One of my mates just decided to sell his Apco Force as his TOP 80 is not coping with horizontal flight with accelerator fully pressed. My Moster is giving me only 0.5 – 1 m/s ascent rate with accelerator fully pressed with my 28m Apco Lift at 38 mph speed. And it is minimum of what I consider to be safe.
I would not say you will experience over thrust and torque effect problems if you got the right harness and it is set up properly (not discussing the paramotors which are not safe by definition). Just as an example – I had Nirvana Rodeo and it was perfect, but when I got Nirvana Instinct (the same engine and moto frame), it was really bad in terms of torque effect – the harness was too big for me and whatever I tried there was a tendency to have a twist-prone position at full throttle.
The same situation with starts and take off – I would say it is much more dependable on your skills and harness settings than 2 kg of extra engine weight. And the other thing is the prospective. If you would ever think about pylon racing, just forget about the light engine – you will need all the thrust you can get. The same rule is if you will have later on to fly the fast wing with about 40 or more mph speed. But if you are of 60kg weight and will fly slow wing with no accelerator ever attached – yes, you can go for light engine. Generally, the engine with more thrust is giving you more flexibility in your future wing choice and paramoto “career”. It might have happened than in one year you will stop doing this hobby, but at the same time it might come to the point when you will start considering to do the tandem flight and light engine will not cope again. Your choice at the end of the day. And of course the choice of the right paramotor (frame, harness, etc.) is not less but may be even more important that the engine.