If you roll a Subaru, you are driving in a situation that the vehicle was not intended to be in.
The Ford F150, while quite capable, won't sidehill as readily as the Subaru, due to the center of gravity being higher.
(i'm running a Ford Ranger with over 250,000 miles on it. so the ford trucks are long living, my Bronco was still running strong when I sold her with 220,000 on it, the F150 I gave to my friend with over 197,000 over ten years ago and she is still running it)
The F150, if 4X4, (and you are in PA? you could use 4X4)
will need to be manually selected (push button or rotary knob) and I recommend manual hubs, the auto hubs aren't all that great for anything except casual, occasional 4X use, they unlock when you let off the throttle, are coasting, or pointed downhill and using compression braking.
The Subaru (later models) are pretty much full time all wheel drive, no wondering if your hubs are locked, or when would be a good time to select 4X4.You just drive it and it gets you there!
The stock Subaru is really not a full blown offroader, it can be made into a quite capable offroader, (lifted with skidplates, brushguards, lights, winches etc, etc) but just off the lot, the F150 (4X4) is more capable of traveling where the roads aren't
If you are just going to trail run, national forest kind of "offroad" then the Subaru should serve you quite well.
Mileage, the Subaru will win hands down,
the best I could manage with my twin tanked, short bed, 5 speed, 300-6 F150 was 30, and that was on a mississippi run with a tailwind (and a can of seafoam in each tank)
The averages were closer to 18-20MPG.
A tonneau cover helps mileage with the pickup trucks, likewise bed cap/campershell).
the one thing I never was fond of about my F150 is that before I got the shell on the bed, I HAD to carry things I purchased in the cab of the truck if I were on a multi stop shopping run.
and if I had a passenger along it could get cluttered fast.
The Subaru has no such issues. passengers and your groceries travel in secure comfort.
I do not know your family size, or your penchant for outings with friends. With the F150 you are limited to three unless you get the extended cab, then five (buckets up front bench seat across back), or six with bench up front as well).
Safety, the Subaru (especially the later models) all have excellent crash ratings.
the F150 holds its own due to sheer mass.
Additionally, the F150 series were made by the double bucketfulls since the dawn of time, parts are readily available at any u-pull it or pick-a-part.
You can also buy a cheaper F150 Custom or XT (base line models) and upgrade your way to a fully loaded XLT Lariat just by bolting on what you want, the F150, and F250 share many components, all body panels are the same (within model years) the primary difference being that the frames/axles/running gear are stouter with the F250, and stouter still with the F350.
Got a F150 with vinyl seats and door panels, find a F150 in a parts yard with cloth interior and just swap it all out, its all drop in without modifying anything dead simple.
Engines are proven in the Fords, likewise the Transmissions (save for the automatics in the 1986 F-series/Econolines and Broncos), the automatic four speed overdrives were prone to slipping and could burn themselves out over time.
Engines to consider for the F150,
the 300 straight six, super simple and is a torque monster,
The 302 (5.0 liter) V8 time tested, hot-roddable
351 (5.7 liter) stout as the cast iron shes forged from, fantastic if you are towing anything, and I mean ANYTHING (this engine is also hot-roddable, drop a cam in this things with forged pistons and a custom engine management system and you are in for one wild ride (at 7 or so mpg).
You will also need to consider adding weight to the bed, over the rear axle for traction during the winter. (sand bags, boiler plate, bodies, sacks of cats, cartons of poodles, etc...) the pickup truck is light on the long end by design. I run 225 pounds of sandbags in the rear of my ranger over the Montana Winter here. it helps.
If you get an older F150 (mid 1980s),You should know that in 1986 Ford was forced to press into production an untested fuel injection system for their truck line (broncos too), the fuel injection and fuel management system for 1986 was oddball, one of a kind, so nothing for any of the other years will fit or function, if you have a 1986 fullsize bronco or F series truck/Econoline van it's unique. only those 1986 parts will work on the 1986.
If it were me, I'd look for a F150 XLT Short bed 4X4 straight six, automatic, manual hubs, 2" lift, skidplated, pushbar/brush guard. winch, full lighting (front, sides, rear) hi-lift jack, bed mounted jerry cans for fuel and water.
A late eighties 4X legacy, lifted, custom bumpers, pushguards, read mounted spare, single fuel can, 15" rims, (etc, etc)
But this isn't about me.
get what you need to get through, 4X4s are going to be cheaper for you in the spring when the need for them isn't so pressing.
but for goodness sake, get rid of that dodge...they are real good lookers, but carry the dodge/chrysler (plymouth) curse of being beautiful to look at, awesome to possess and utterly reliable...for the first six months.
(I'm speaking from experience)
(lean towards the Subaru...you can't go wrong with a Subaru, and this is coming from a Ford guy!)
Best of luck on your quest!