Your truck will probably do OK with that size of a trailer assuming you have done the math on the weights and such and your transmission can handle the load. But, you will need a weight distribution hitch system to tow also. Your truck will also need to be installed with electric trailer brakes, if it is not already. And you will need a 7 pin wiring female plug on the truck for trailer brakes, and all lights, if it does not already have it in place. You cannot get by with a 4 pin plug. The 4 pin runs lights only. You'll need trailer brakes working also.
Whatever fuel mileage you are receiving on your current truck, you can "expect" that to drop to about 9-10 miles per gallon when towing the trailer. Almost every vehicle towing a trailer, diesel or gas of any size vehicle or trailer seems to average between 9 and 11 mpg. So, when that happens, don't be dismayed. Your camper will have a huge front sale that resists wind. The faster you travel, the greater the resistance, dropping fuel mileage even more. Just be aware of the miles per gallon right now if you are in the process of planning future expenses. Yes, vehicles can tow it, but at what cost on fuel?
The next thing you need to consider is the type of camping you are planning on doing. Both of the campers you've selected are not built for off road travel. They are designed for paved road travel, and won't survive if you attempt to travel on dirt, mountain, or wilderness pathways. They just aren't designed for that type of use.
That brings up the next consideration? Are you planning on camping only at sites that provide full hook-ups (water, electric, and sewer), or are you planning on doing boondocking, (or dry camping) with no available water, electric, and sewer), as as some State Parks have ... electric sites only. This decision, up front, will determine what you will deem most important and necessary for future travels. If boondocking (or no electric available camping) is your primary objective, then you'll need to have the camper outfitted with solar power and a good battery bank, or at least a good generator (gas, propane, or diesel). Electric solar powered generators are not truly generators. They are just big rechargeable batteries.
Considering you have narrowed down two different models, the next feature to be concerned about is inside storage. The floor plans may be similar, but they can be quite different in the way storage is built into the unit. Storage space on any camper is limited, and those small spaces fill up quick! More storage is always needed. It does take time to learn how to live on less "stuff" though, but this does come with time. But the more space you have up front is all to your advantage.
Next, consider WHERE the hook-ups are located and where the holding tank pull handles and discharge pipes are located. This can be a real challenge, especially if you are older and you have to actually crawl under the camper to reach the pull handles to dump the tanks. The location of the dump valve handles and the discharge pipes could make a huge difference in your choice of models. Check that out with both models.
Where does the water and electric plug into the camper? How big are the holding tanks. There is a HUGE difference if the black tank (toilet) is a 25 gallon tank or a 50 gallon tank. And a HUGE difference if the fresh water tank is 25, 30, 40, or 50 gallons ... especially if you plan on no water hook-up camp sites. And does the fresh water tank a gravity fill system or is it filled by connecting a garden hose and the spigot water pressure fills the fresh water tank. Each have their advantages and disadvantages, again, depending on the situation of your camp site location.
As far as quality and build of both campers, they are most-probably about the same, as ALL campers are about the same. They are NOT built like automobiles. You WILL have initial warranty issues, you will experience a sense of disappointment and perhaps even anger at the manufacturers for the shoddy craftsmanship of ANY camper you select. It's a very hard and painful learning curve.... they are not built to automobile standards .... nothing like that.
I've covered a bunch of topics, probably not what you were expecting, and perhaps you have already worked your way though all of these things. If you have, that's great!
My best advise for you is two fold: 1) Go visit an RV dealership that sells both models and spend some time in each model. Even have the dealership close the slides and see if you can navigate the camper with slides pulled in. This could also be a deal breaker between one or the other brand. So, physically go, spend time in both campers. Imagine being stuck in the camper when it's raining and you can't get outside. .... how comfortable is the bed? How do the tires look? Do you like the color scheme? Make a list of the the things that you like and the things you don't like and compare the two models. You may find there are some features you can't live with at all and completely reject both models. It's better you do this now than AFTER the purchase.
2) If none of my "ramblings" has helped, and you are looking for a different answer, it would help if you were a little more specific. Exactly what is your biggest concerns about both of these campers. What is your biggest concern personally. Lots of folks on these forums WILL give you some very, very good information and advise.
I do wish you well in your decision making process. And for what it's worth ... I'm 71 year old too.
