Hi:
I get a decent stable ride at 12 to 13 knots in 3 to 5's in my 31. We came from a Silverton. In those conditions the Silverton had to be slowed down to around 10 knots and at that speed it was basically plowing and burning 3 times the fuel. It didn't track well at that speed and it rolled a bit more. I would say the Ranger Tug handles rough water better but like it has been said there are compromises. I crossed the Gulf in the Silverton from Tampa, FL to Appalachicola, FL and encountered 4' to 6'. It was not a good ride at all trying to maintain plane. I think the Ranger would have taken it better however this is not really apples to apples. The Tug would have done an excellent job at 12 to 13 knots but the Silverton would have been running at 10 knots. The ride would have been slightly better in the Silverton at 20 knots but in either boat the ride would not be pleasant. I would agree the Silverton was slightly better in following seas.
Our goal was to get away from gas burners and get something more manageable. We are about the same age. We had a horrible experience with an explosion with the Silverton (long story). I don't want to start the gas vs diesel debate but for me it gave us the opportunity to fix what we didn't like. We loved the Silverton but she has gone to a better place and so have we.
Was it worth the extra $100 to $150k to change? For us yes. Diesel, easier to handle, better fuel economy, well thought out design, easier to dock, less affected by windage, compact and functional, suitable for cruising, fishing and recreation.
i highly recommend getting a demo. We would not have made the move without the demo.
I hope this helps.