The problem is that Fram used to be good, but they have cheapened their construction over time, using cardboard components inside and thinner metal walls. Mobil 1 and K&N are constructed of a thicker metal. It may not sound important, but to anyone that has had to remove a stuck filter it is. The thicker metal prevents the filter from crushing when you go at it with a big pair of pliers, oil wrench, or strap wrench. The K&N has the bolt on the end, so you can use a standard wrench. If all else fails and you need to stab it with a screwdriver, the thinner walls of a cheap filter will just tear, leaving a now extremely sharp edged stuck filter. The thicker walls of the better filters will be more likely to hold up.
I'm sure all of the filters on the market meet minimum specifications for all vehicles they are designed for, so yes, the Fram is probably adequate. However, many of us use more expensive synthetic oil even though traditional oil is probably acceptable too. Most of us have over $30k invested in our trucks. To me, it doesn't make sense to save $5 on an oil filter, even if you only take into account the convenience factor of removing a stuck filter. I change my oil about 4 times a year, so $20/year is really not that bad. Even if it was $40/year, it's really pennies compared to how much we spend on other things for our trucks.
I'm guessing that the larger filter probably costs more than the standard size. You are also going to spend another $3 on dino oil, or $6 on synthetic to fill the extra space in the filter, so your savings is a wash. Personally, I still don't see a benefit of a larger filter. Considering how much we've spent on our trucks, I am sticking to the oil change schedule listed in the manual, and going with the parts designed for it.