CFE223 was the original Hornady 204 Ruger powder in its factory loads. The anti copper fouling ingredient was a vital factor to avoid the .17 Remington issues of a generation before - claims of excessive barrel copper fouling in US gun magazines ruining the cartridge's reputation and sales. It also met Hornady's MV requirements to allow the claim of fastest production cartridge on sale. So, it's unsurprising your handloads match factory performance.
On a wider note, CFE is a 'Marmite' powder - users seem to find it either excellent or useless. It sees little, more likely nil, use in precision loads for the 223, 308 and suchlike, but that applies to most ball-type powders before the 'Accuflat' (Winchester StaBALL) range, and we still have to see if the StaBALLs live up to the claims.