Pennsylvania Features:
.50 Caliber
40.25" Blued Barrel with Percussion Ignition System
Walnut Stock
1:66 Twist
Double-Set Triggers
Adj,/Blade Sights
Kentucky Rifle Features:
.50 caliber
33.5" Blued Barrel with Percussion ignition system
1:66" Twist
Single Trigger
Fixed/Blade Sights
Select Hardwoods Stock
Both will shoot better than you will unless you are a world class target shooter, so no worries there.
Both, as stated, are a decent rifle to get you going in the sport, whether hunting or target shooting/plinking and they won't strain the wallet to the same degree a custom/semi-custom would.
You may not stay with the sport so you won't have a ton invested. If you do stay, you will move up to another rifle.
From the specs above here's my take:
The longer barrel on the Penn (40'ish vice 33'ish) will make it "appear" more accurate. The longer the sight distance the better the average person tends to shoot.
However, that is an extra 7" of barrel which may be awkward in "your" particular situation (that's personal).
The Penn has double set triggers, the Kentucky single trigger. While double set's look "cool" they have almost zero benefit for "hunting". If your sole purpose is hunting, the single trigger is fine/desirable.
The Penn stock is Walnut, the Kentucky is listed as "hardwood" (probably Beech). With a bit of refinishing you can make the Walnut look "awesome", the "hardwood" is always going to look like a chunk of lumber from Lowe's.
The Penn has "adjustable" sights so you can "dial it in" with practice. The Kentucky has "fixed" sights which you would either learn to live with (many use fixed sights on traditional arms) but many who simply use these as hunting rifles for a week or two during the year would invest in adjustable sights and replace the fixed ones.
The Pennsylvania is a "whole lot more rifle" than the Kentucky, but that is reflected in the price.
The Penn will not kill a deer any "deader" than the Kentucky but may look a whole lot "cooler" doing it - that's my take...