PSA's FN (Fabrique Nacionale) barrel is CHF (cold hammer forged) and 1x7 twist.
Deltons are usually 1x9 twist.
The FN made barrel is a better barrel.
If you are mostly shooting 55 grain ammo, the 1x9 will probably be more accurate.
Anything longer like 62 grain, is a toss up for the 1x7 will probably be better.
CHF barrels are more reliable and durable.
FN barrels are usally markd hp/mp, high pressure and magnetic particle tested, so there's much less chance of it breaking on your.
Delton doesn't do those tests.
Sell the delton, carry the FN.