apples and oranges
Not a valid comparison. The two rifles are at the end of the spectrum from each other.
An all up M1A will go near 10 lbs, maybe more. They are also a full length rifle, awkaward in and out of vehs, structure and thick stuff. They do not scope well without adding a cheekpiece, or if IER scoped, changing the balance noteably. For me, they do not carry well. I want to grab one right at the magazine. They do prolonged fire well, are accurate, reliable, and if I had "enemy in the wire" (politically correct, take note) I'd want one. And since I already own a Scout (Savage) I'd pick the M1A. They take a bayonet too.
An all up Scout "should" had length and weight factors, that translated (form metric) into under 7 lbs and just over a yard in length. Noteably lighter than an M1A,. The scout scope did not require tweaking the stock, but could change the balance. I off set mine by adding a butt cuff of ammo. Mine carries easy and to use the originators phrase, "is not much more cumbersome than a walking stick". The longest string I ever shot with it was 10 rds in 2 minutes (with a manual reload from the cuff). The scout is a GP rifle intended to be carried a lot, and shot a little.
A Savage or Ruger scout will cost about half of an M1A. My Savage from 10 yrs or so ago was about half the price, w/ a good optic. I've always wanted an M1A,and the SOCOM was tempting too, but I bought a Scout.