As far as I can determine group 65 is correct for your truck.
I like to proactively replace my batteries at 3-4 years, started doing this after a battery failed in the middle of the night! By replacing a battery before the old one fails you can shop by price, special sales. My car has a Duracell from Sam’s but my truck has a Motorcraft because of a rebate when on sale.
In addition to what It_s_Me said the group 65 will probably fit better in the battery box/holder. Generally within a group size there will be different CCA (see explanation below), higher CCA higher price, but over the life of the battery it’s negligible. The higher range batteries often have a slightly better warranty. As to brand, there are only a handful of manufacturers, that produce all the batteries available.
CCA is a very important battery performance indicator. It’s based on how well a new battery will supply sufficient power for 30 seconds, at zero degrees Fahrenheit. The higher the number, the better.
Your new battery’s CCA number should match the CCA number in your owner’s manual, or the CCA of the vehicle’s original battery. If you live in a cold climate, a slightly higher CCA rating may be beneficial to your vehicle’s cold-starting performance.