They're both like big beach toys. As you say, pulling up on a beach or sand bar is VERY easy, much like a 'toon. Both boats sit kinda low in the water, and with the front end beached, you can just walk up and sit down on the front deck pretty easily. Handling is a non event. Because of thier low profile and light weight, they're very easy to load and unload on their trailers. The bigger boat trailer has guides that are a help as that boat is often used where currents are an issue.
Pontoon guy from WAY back here. Have lived on a lake in Mi. for 45 years, and have had a 'toon most of that time. From the Fl place, we were trailering 10 miles to get to boat landings on rivers about 5 miles inland from the Gulf. The time it took to get to the Gulf, or ANYWHERE with the pontoon became an issue, so mentally, I started shopping around for something else that might work out for us.
I wanted a trailerable boat that would handle 6 adults comfortably. Something we could putt around and cruise with like we did with the 'toon, but something with some "go somewhere" when we wanted to for adventures in the Gulf. I came upon the deck boat solution, but they are SO heavy, and I didn't want to own a big tow vehicle. Then I noticed these alum. boats, and being the DIY'er that I am, that's the way we went.
I only have about 6k into the 22' boat. It was in need of an interior and some TLC, but the rest was fine. I swapped a 120 Johnson that was on it and replaced it with a 90hp Honda fixer upper that hasn't run in a couple of years. Working on mid size Honda's is my hobby. They're how I finance my toys, so the motor was just an exercise in a general, but very thorough, freshen up. It just kind of hums on the idle. Often difficult to hear for these old ears, so I have to reference the tach to see if it's running. 4 stroke chosen for it's ability to idle reliably for hours.
With some patience, and a willingness to do a road trip, they're out there. To find one, try searchtempestdotcom, doing your search in "boats" AND "boat parts", for the word "deck" in the title, a upper dollar limit, and the max range you're willing to drive.
If you find something and have questions, be happy to share my experience. Just post a note here or shoot me a PM.
Good hunting! -Al