After 20 years of towing various TT's we went with a new 5'er. Easy to notice the difference. While each of our TT's towed fine theres no comparison to how the 5'er tows. Moderate winds, semi's passing etc. are no longer noticed at all. So much more relaxing.
With a TT similar experiences maybe possible with a hitch such as the Hensley Arrow but I'd rather have the added benefits of a 5'er. Most 5'ers have far more outside storage over the same floor plan in a TT. Love the storage!
TT's are not lighter than 5'ers by default. Similar floor plan TT's and length are close to the same weight at least in the models I was looking at.