Federal 223b has the same ballistics specs as their American Eagle brand 55gr FMJBT, per Federal's web site tables, so no apparent difference in that regard.
I use the AE brand consistently, but don't know what its MSRP is. I can get it at my local dealer by the 500rd case for about $110 or $4.40 for a 20rd box. Even in single boxes I have never paid more than $5 per box for AE.
I find the AE brand perfectly acceptable for casual target shooting: consistent shooting characteristics, appears well made, accurate enough for my purposes, and never had any issues with it in my DPMS 20" HBAR A2.
I have no experience with their Federal brand, so I cannot comment from personal experience on whether it's worth a much greater price than the AE brand.
IMHO it depends on what you intend to use such ammo for, and the actual price you were quoted.
But it seems to me $10 a box is a might high if you are only intending to put holes in paper.