I'm not a beta tester, but using wowhead.com, one is able to find how our spells are changing.
Flash Heal in Wrath -> Flash Heal in Cata(scale it to level 79, the level than rank 11 FH is learned.)
Greater Heal in Wrath -> Greater Heal in Cata(scale it to level 78, the level that rank 9 Greater Heal is learned)
Those two were the easiest since they did not change much. The Spell ID's are identical to rank 1 of the respective spells. Notice how FH has received roughly a 50% increase in thoroughput and cost. Greater heal in Cata and in Wrath have the same mana cost but in Cata, GH has a ~50% increase in thoroughput.
Heal in Wrath -> Heal in Cata(scale it to level 34, the level of the level than rank 4 Heal is learned)
As you may notice, the Spell Id's are different, and the Cataclysm Heal is actually Wrath Lesser Heal. The thoroughput is roughly equal, but the mana cost is dramatically lowered.
Just as a Comparison, here are the values are level 85:
Fast and inefficient Flash Heal: 28% base mana, 1.5s cast, heals 5227 - 6073
Extremely efficient Heal: 6% base mana, 3s cast, heals 3485 - 4049
Efficient, but slow Greater Heal: 32% base mana, 3s cast, heals 6969 - 8097