What's the point of comparing them this way? In a real game, such situations (archers vs. cavalry) won't occur.
With Valeska, the early game and clearing out gnome-mages, conserves, etc., are easier.
Справочник по НоММ-4 http://handbookhmm.ru/pamyatka-dlya-heroes-iv.html
Памятка по НоММ-3 http://handbookhmm.ru/pamyatka-dlya-homm-iii.html
и HotA http://handbookhmm.ru/vyishla-obnovlennaya-pamyatka-dlya-homm-iii-hota.html