Having owned several Marauder’s both gen 1 & 2 in all calibers my suggestion is to invest in the basic marauder and the balance of the difference in optics.
if sub quarter size groups at 50 yards and 4 mags minimum per fill are inadequate, then the F&T would be a better choice.
You will get less energy on the target, and yes, you can tune it for more energy but you will give up the shot count you paid for in the F&T.
Is the LW barrel worth it? Personally, I’m not going to spend the money installing one in in my guns to shrink the groups by a mear 1/4”@50y.
besides, you can always get the barrel and the reg later down the road if you just gotta have them.
let your wallet and you conscience be your guide.