Now if you take into account the "5second rule" mana regeneration into account. Mana efficiency can differ.
For example if you are using SotC+Consecration. You will always get 2ticks of mana before recasting Consecration. If you have 30mana per tick, thats easily half of the mana cost of Consecration r1, making it even more mana efficient. If you are using only JotC+SoC you regen mana back till the mob is dead and you have to JotC the next mob. For leveling purposes(or grinding at lvl 60) having mana ticks in mind when comparing diferent Rotations(playstyles) can be very valuable for a Paladin. Spirit>Intelect duh... for leveling esp.
Using mana regen ticks when im tanking dungeons with SotC+Consecration lets me never OOM before healer or other mana users while tanking just fine.