This is probably true for the Jackery. The GZ costs more relatively but has expanded capabilities. GZ can charge 5 or 10 amps from one $39 car charger. Gang two of them for 10-20 amps charge rates. Or add the GZ Yeti Link Car Charger Module for up to 40+ amp rates. I recall at least a couple that have installed the big link charger on this board.
That said, IMO there's a preoccupation with charge rates. It really comes down to usage. I find even with heavy use supporting my family of 4 for car camping: coffee, old George Foreman (makes a great portable sandwich panini press and food warmer with a sheet of foil for easy cleanup), 5-10amps will keep up all day. I also use my GZ in my camper (did I mention it's flexibility is awesome!), where it powers all the 120V stuff: microwave, rice cooker, hair dryer, Keurig, charge laptops, TVs: all I need there is still just 5 amps charge rates (via installed solar on roof). It's easy to get caught up with more and bigger numbers. Research made it seem I needed the highest capacities, MPPT upgrade, etc. Reality is I didn't need any of that, for me.
Though everyone's use is different and it's good to have options. The GZ has good options. So does custom installed dual batts which can be anything one wants to make of it.