In TG Sicilians are quite average at best.
As pocket they’re good in castle age, but in imperial their strength fades away because Hauberk Cavaliers die to Paladins, trade equally with regular FU camels (which is already a disadvantage resource wise), obviously die to elephants, boyars, leitis, konniks and so on.
Hauberk Cavaliers are super powerful 1v1 because no Paladins and no elephants, plus a lot of other UUs are rarely seen, in TG, they’re not a problem at all, assuming equal skill.