You want to cook low and slow
Ribs, pork shoulder and brisket need a temperature you can hold for six hours or more. A pellet grill does that on its own. Charcoal does it better if you enjoy managing a fire, and worse if you do not.
Gas and charcoal grills, flat top griddles, smokers and pizza ovens. Advice on what to buy, and what you can skip.
Comparison · Pellet grills and smokers
The 700 has 44 percent more cooking space. It also has a 21 pound hopper against the 500's 5 pounds, and that second number is the one that decides whether you can run an overnight cook.
Comparison · Charcoal grills
Same bowl, same 363 square inches, same warranty. The Premium costs more for a hinged grate, a lid thermometer and a closed ash catcher. Two of those three are worth paying for, and only if you cook a certain way.
There is a lot of gear out there and most of it is fine. The hard part is working out which kind of thing you need before you start comparing models against each other.
Start with what you cook and where it is going to sit. That usually rules out most of these categories in about a minute, and the rest gets a lot easier after that.

Propane grills. Total BTU is the headline number, but what predicts preheat and recovery is that output spread across the primary grate, and neither figure is on the retail listing.

Flat tops. Plate thickness decides how far the surface temperature falls when cold food lands on it, and independent burner control decides whether you get a hot zone and a cool one at the same time.

Pellet, electric and propane. What the controller holds at a set point in cold weather matters more than the temperature range printed on the box.

Kettles and portables. Vent hardware and lid seal decide whether you can hold a low temperature for a long cook, and cooking area tells you almost nothing about that.

Gas, electric and multi-fuel. Peak stone temperature sells the oven. How fast the stone recovers between bakes decides the second pizza, and it is published far less often.
Most people buy the grill first and work out the cooking afterwards. It goes better the other way round.
Ribs, pork shoulder and brisket need a temperature you can hold for six hours or more. A pellet grill does that on its own. Charcoal does it better if you enjoy managing a fire, and worse if you do not.
Gas lights instantly and gets to temperature while you are still carrying the food out. You give up some of the flavour charcoal gives you, and most people decide that trade is worth it on a weeknight.
A flat top handles eggs, pancakes, smash burgers and anything that would fall through a grate. It will not do indirect heat, so it adds to a grill rather than replacing one.
A kitchen oven cannot get near the temperature the style is built around, which is the whole reason these exist. Nearly all of them reach it. How fast the stone recovers between bakes is what separates them, and it is the figure nobody prints.
Where the grill will stand rules out more options than any spec on any page. Check the clearance the manufacturer requires to a wall, a rail or a soffit, and check it before you fall in love with something. On a covered patio that number ends a lot of searches on its own.
Check the rules too. Plenty of towns and most apartment leases restrict charcoal and open flame on a balcony, and no product page will mention it.
Then measure the width with the side shelves up, which is never the number in the product title.