The Pro series has chains and offers no sway control by itself. You must use a seperate sway device. both the chain brackets and sway control require drilling into your trailer tongue bars.
With the fastway which is a copy of the Equalizer the sway control is built in. And no drilling required!
So actually the advantage goes to the fastway!
I am happy you decided to use some type of WDH, I don't really care which one, I just provided a link so you would understand...you don't have to spend a fortune to 'correctly' tow your trailer.
The E2 you chose is a good set up, you'll be happy with it. With every hitch type there are advantages and disadvantages.
The E2 does 'copy' the design attributes of the Equal-izer hitch but has a two point sway control system compared to the 4 point system of the Equal-izer.
The Eaz-lift does use 'chains', but chains can be a good thing (you'll find out). With respect to making adjustments...it is MUCH easier to simply hook onto a different link...than it is to unbolt your 'L' brackets to adjust the weighted level.
The sway control device on the Eaz-lift is not 'integrated', true. But the installation is quite simple. If you have no objection to drilling a few pilot holes for the self tapping rolock screws, then you can have a friction adjustable sway device. The amount of friction is controlled by a clamping device you screw in or out by hand. You can add a second unit on the other side, but rarely is that needed.
The E2 does not have any way to adjust the friction. It either combats 'sway' at the point where it almost isn't needed anyway, or tries to control it once it has already started.
The 'saddles' of the Eaz-Lift clamp on the trailer tongue, so no drilling there. Make sure you don't lose the cam over tool provided with the E2. Although you'll want to use your tongue jack to raise the truck and trailer (to relieve pressure) to seat the spring arms, in certain settings...that isn't always possible.
If you don't have your cam over tool, you probably aren't going to get the arms in place (without dropping the L bracket). With the Eaz-Lift if you lose the break over tool (essentially a small pipe) you can use any type lever that will fit over the stud on the saddle.
Folks say you can't 'back up' using the sway control on the Eaz-lift. Nonsense. Yeah...you actually have to get out of your vehicle and unwind the tension of the sway control a couple of rounds, or just take it off if you need to make a sharp backing turn (pull two pins).
As you gain more experience RVing....you will see both types on vehicles. One not necessarily 'better' than the other, but one might be 'best' for YOUR application.
Take the time to set up the hitch correctly. Then 'try' to load your trailer with roughly the same weight distribution each time and you'll never have to adjust the hitch. If you plan to tow very often then the ultimate set up (for quick adjusting) is a combination of a WDH....AND air bags.
But for your set up....you'll do fine with what you have chosen. Have fun, be careful.
Flint.