I assume you are talking about enchanted/imbrued Brellium plate armour for clerics, not the Icewell dropped armour set?
it varies piece by piece, but here is a like for like comparison for visible set:
Code:
Visible Enchanted Imbued Set Totals (1 bracer)
AC STR STA AGI DEX WIS INT CHA HP Mana SvM SvF SvC SvP SvD
125 41 44 0 0 26 0 0 0 0 17 24 0 0 0
Armor of Forbidden Rites Set Totals (1 bracer)
AC STR STA AGI DEX WIS INT CHA HP Mana SvM SvF SvC SvP SvD
155 4 12 7 8 30 0 7 180 195 13 5 9 3 5
Thurg is giving a lot more wisdom and mana, has more AC and will produce more hp (even considering stamina).
Dwarf has the advantage of being resellable if you plan to upgrade. If you don't mind mixmatch, some individual pieces of dwarf is probably better than thurg, boots and hands, perhaps more.