None of those 1h outreach Katana. As to outreaching a spear... I think you should stay away from theorizing.
The + to thrust is +80.
Sigh, no -- katana has the longest reach attack, the thrust. It doesn't matter what the 1hander does.
The longest reach attack? You can barely call the katana stab an attack, 16p will glance 80% of the time.
The katana shouldn't have its swing buffed from 35c to 37c. It should have get its stab buffed to 19p/20p. It was 35c and 18p before, I would still love to have a conversation about that with the guy who thought it was necesarry to nerf the katana back then to a 16p thrust.
Also on the subject of ghost reach, all curved weapons have ghost reach. I think the actual length of the curved model is somehow the actual range cause they hit from miles away. I have experienced the following weapons as having ghost reach on several occasions: scimitars, katana, miaodao, highland claymore and the barmace. The first three are curved, the latter two are just borked. Pretty sure they have it though.