If he's talking about Comparing Titansteel Spellblade with Titansteel Guardian its depends on whether or not he's hit capped and if that char can use a dagger or mace?

Here's a comparison.
http://www.wowhead.com/?compare=45085;41384

Guardian is slightly better for pvp dues to the increase in stam and no points wasted on hit rating.

spellblade slightly better for pve due to the hit rating.

But if yer hit capped I say guardian is better cause of more spell power

Although for a healer I think guardian is slightly better for the Spell power and since they don't need hit rating.