Gonna give my THF Homam Corazza/Homam Cosciales instead of Rapparee Harness/Skadi's Chausses:
THF/WAR vs SAM/WAR (GKT to begin with)
Blau D33 Delay178 5.1TP/hit vs Hagun D75 Delay450 16.7TP/hit
18% haste => 145.96 delay vs 19% haste => 364.5 delay
At equal time, Blau has hit 364.5 times and Hagun has hit 145.96 times,
Blau: 12028.5 + 364.5fSTR[thf]
Hagun: 10947 + 145.96fSTR[sam]
Blau advantage: 1081.5 + (364.5fSTR[thf] - 145.96fSTR[sam])
Let fSTR = 3 for THF and 8 for SAM.
Blau advantage: 1081.5 - 74.18 = 1007.32
DoT advantage over Hagun (base stats): +8.3%~
TP gain:
At equal time, Blau has hit 364.5 times and Hagun has hit 145.96 times,
Blau: 364.5 x 5.1 = 1858.95 (I know the last decimal would disappear normally)
Hagun: 145.96 x 16.7 = 2437.532 (etc etc last decimals)
Hagun WS frequency advantage (base stats): +31.1%~
Berserk is constant with both so we'll ignore that, likewise Double Attack. Meditate is a slight WS frequency advantage over time for SAM. Hasso's haste is slightly better than 10% Triple Attack at good levels of Haste, but the difference is not huge. I won't factor Sneak Attack/Trick Attack; too many variables... in terms of weaponskills, Mandalic Stab is strong on anything that Gekko excels on (HNM etc) but requires either SA or TA to be effective. On anything lower, Shark Bite (also requiring SA or TA) or DE/Evis are strong.
SAM is going to win here. I don't think the difference is as huge as you would expect though. With regards to Polearm SAM, that needs a different comparison itself ;x I've got a headache now so I'll just leave it here and it is incomplete, but it shows that THF doesn't get absolutely destroyed at least.