Yes and no. I think it's largely a styling exercise.
For example, my little 1500 puts out more power (on paper) than my 3500 Cummins does, and it has a relatively small grille.
Then again, it doesn't have an intercooler, just a charge air cooler.
Your 1500 isn’t rated to tow 20k+ on a near 100% duty cycle.
It’s why you don’t see little turbo gas engines in 3/4-ton and up trucks like you do the 1/2-tons either. Duty cycle would kill them.
Hmmm....
The Ford 3.0L Diesel is listed at 250 hp @ 3,250 rpm
The RAM 3.0L Diesel is listed at 260 hp @ 3,600 rpm
The GMC 3.0L Diesel is listed at 305 hp @ 3,750 rpm
The RAM 3.6L Gas is listed at 305 hp @ 6,350 rpm
The Titan 5.0L Diesel is listed at 310 hp @ 3,200 rpm
The RAM 5.7L Gas is listed at 395 hp @ 5,600 rpm
The RAM 5.9L Diesel is listed at 160 hp at 2,500 rpm to 235 hp at 2,700 rpm
The RAM 6.7L Diesel is listed at 370 to 400 HP at 2800 RPM.
There is a lot of talk about low end torque vs hp, but a lot of that can be dealt with a good transmission.
There certainly are better downstream parts on the heavier pickups. Nonetheless, the 1500 series pickups aren't toys either. I tow a lot with mine. I cut it off somewhere around 8K to 10K, and it does quite well. I've thought about 15K, although Oregon wants a "T" license to tow trailers at over 8K (will probably fudge a little, but 20K would be too much). Plus, a monster trailer would be mighty pushy for a smaller pickup. Wheelie anybody? And the little 3.6L gas engine struggles to hold the trailer back going downhill.
Anyway, unless one is doing a lot of long hill climbs, one typically isn't sitting at 100% power, and one can let off of the accelerator a bit when crossing the continental divide. I'll do pedal to the metal to get my trailer up to freeway speeds, but that only lasts a few seconds before I let off of the power.
One has to look at the engine, but also all the downstream parts, engine, transmission, driveline, rear-end, springs, and even the frame.
Also lots of changes over time. My 3.6L V6 might almost challenge an old 327 Corvette. But, even the old 3/4 and 1 ton pickups are a far cry from what we have today.
But, choose the pickup for the task.
The 1500 will be able to do a lot of grocery runs!!!