Just checked the specs for Armscor and Federal American Eagle .38 Special FMJ ammo. The Federal ammo is about $1.00/box more.
Armscor 125 gr. 1875 fps muzzle velocity, 984 ft. lb. muzzle energy
American Eagle: 130 gr. 950 fps muzzle velocity, 250 ft. lb. muzzle energy
I'm afraid you've got your specs mixed up. While your figures for Federal are correct, the velocity you list for Armscor is for their .357 Magnum ammo, not their .38 Special. Armscor 125grn .38's are listed at 1050fps velocity for 306 ft.lbs of energy from a 4" barrel (the same length as Federal)
http://www.armscor.com.ph/centerfire_pistol.htm
Also, it is worth of note that while most U.S manufacturers list their .357 Magnum velocities from a 4" barrel, Armscor lists theirs from a 10" barrel.
As to the OP's question, I've shot some of their 124grn 9mm FMJ before and didn't notice the accuracy, reliability, or cleanliness of it as being noticeably different from WWB, UMC, American Eagle, Blazer, S&B, Fiocchi, or any other common practice ammo. If I found some for a good price, I wouldn't hesitate to buy more.