Well.....lets see, Ive had the Sig, FEG's, CZ's, Mauser, Keltec (currently wifes CCW),Bersa and other 380's....and the apples/oranges is relevent. You have Pros and Cons for both guns.
Pros....
Sig.....excellent fit and finish, reliable, accurate and nice trigger.
KT.....Small and light, excellent DAO trigger, as accurate as the Sig easily!!!!! Locked breech for less recoil than similar guns and inexpensive to buy.
Cons...
Sig...Large for a 380(compared to others), expensive, ammo picky on 2 guns Ive shot, snappy recoil for some shooters.
KT....first run of guns had probs with pins (resolved), lots of negative stuff posted on the internet that some people will actually listen too!
Both have great qualities and negatives......Shoot them both and make your choice........
Shoot well.