ill try the same gear with a lvl 20 n 29, but in reality u can tell an Hp difference, if they both r naked. ill be honest , id rather have glyph and abilities then Hp
lets say you for argument sake a 20 really did gain 1000 -1500 hp.
20 resto shaman vs a 29 resto shaman/ abilities gained thru levels - Gear scales the same. So lets look at abilities, shall we:
1)Frost shock @ 22 slows target movement speed by 50% for 8 secs
2) Water walk @ 24 helps team & yourself in AB
3) Earth Shield @ 26 increase healing on target by 20%
4) Earthbind Totem @ 26 totem with 20 secs of slows within 10 yards
5) Chain lighting @ 28 - Hurls a lighting bolt , dealing (60.7% of Spell power) Nature damage and then jumping to additional nearby enemies. Affects 3 targets
Glyphs -
(major) chain lighting - hits 2 more targets but 10% less damage great for spinning flag until help gets there
(major) glyph of ghost wolf - hinders slows by movement speed
(major) frost shock - lowers frost shock by 2 secs
(major) glyph of purge - dispel 1 additional magic effect but has a 6 sec cool down
(minor) spirit wolf - ghost wold can be used while your a ghost form
HoneyBadgers been drinking a bit I'm sure I made tons of mistakes & typos. lol
Conclusion - 29 > 20
Fuç% Hp , this conclusion is lvl vs lvl wise not player skill wise or f2p vs p2p or any ßull$hyt like that. plus 20 & 29 may even be the exact same hp , ill test later , maybe .... ( hiccup ) lol