I tow a 3600 lb vehicle on a tow dolly. My tow rating is 5000 pounds and I seem not to have any problems towing this vehicle.
Prior to this I had a Subaru Outback that had about the same curb weight. I did flat tow this car. There was no detectable difference between towing either of the vehicles. It takes about the same time to strap my current vehicle down onto the dolly as it took to hitch up the Subaru for flat towing. I personally prefer dolly towing because my dolly is equipped with a surge brake, and this makes it very versatile to be used for all kinds of purposes (like as a small trailer behind my vehicle)