AFAIK, if the scope base covers the name and serial number, it's a repro A4 from a converted A3. If they are separated apart so that the serial number appears below the scope base, so it can be seen, then it was built as an A4 from the factory.
The location of the "Remington" on yours leads me to believe that it was moved further that way, and the serial number is probably also moved, so that nothing is obscured by the base, making them legit A4s.
top one , barrel is a replacement. original was likely 12-43 or 1-44. rifle looks refinished. the bottom, also has a replacement barrel, original was likely 7-43 to 9-43, scopes are both replacements, likely added after they were sold as surplus, both have replacement stocks. top is incorrect for a 1903A4, correct for a late rifle likely was a Scant grip stock, like the bottom one has, the bottom stock, looks to be a replacement made by Milton Bradly. the square cut on the cut off clearance. bottom one looks to have original metal finish. both look to be real A4s, and worth bring back to correct. more pictures would help a better assesment of them
warpath metal finishing contact info. molinenorski@msn.com
720-841-1399 during normal bus, hours.
The leather cheekpad on the lower rifle is not appropriate for an M903A4 sniper. They were deigned for the M1 Garand Snipers (the M1 C and M1 D).
The upper rifle appears to be equipped with an M1903A3 Straight stock. A4's should have a full pistol grip (M1903A1) or Scant grip stock.
M82 Scopes were approved for use on A4's in around 1957 on an "exhaust" basis.
The rings mounting the M82 look like GI rings to me but the 1' rings mounting the K3 are commercial rings