Here's why it doesn't matter:
Assuming full 210 raid gear (with a 210 esoterics ring)--because I'm too lazy to do crafted on the numbers, here's your stats with all points into str (and slaying accessories) because DPS meta obviously, as a paladin (OP's main class according to the forum tags):
1030str 595crt 457det 561ss 833vit 553parry Xaela
1024str 595crt 457det 561ss 830vit 553parry Raen
And, of course, weapon damage between the two will be equal at 76 (again, assuming 210 raid gear).
Now, lets look at stat weights:
STR: 1.000
WD: 9.607
DET: 0.132
CRT: 0.152
Sw/Oath SS: 0.091
Sh/Oath SS: 0.104
Now, let us do some maths:
Str stays the same as it's the baseline.
Weapon damage is equivalent to: 730.1 str.
Det is equivalent to: 60.3 str
Crit is equivalent to: 90.4 str.
SS is equivalent to (in sword oath 'cause we're looking at DPS differences): 51 str.
So let's add all that up: 931.8 equivalent str from secondary stats and weapon damage.
Now let's add that to our original str values:
1961.8 Str equivalent for Xaela
1955.8 Str equivalent for Raen (obviously, as it's a 6 point difference).
So, what percentage of your DPS is that then?
Raen switching races to Xaela would see a 0.3% increase in their DPS. Or vice versa with a 0.3% decrease.
Lets break that down even further: The current highest DPS on (a site that collects log data that I won't list here because bluh bluh parsing) vs Faust for Paladin is 1,377. A change of 0.3% there is 4 dps. If that paladin had 6 less str their DPS would have been 1,373, still about 40 DPS higher than second place. Even competing at the very top DPS on Faust, with DPS classes, a 0.3% decrease in their DPS wouldn't be enough to change their rankings.
Literally any fraction of a second mistake in battle will make infinitely more difference than 6 str. Racial stats matter such an infinitesimally small amount that they aren't even worth considering.
As for HP, the difference is: 16445 for Xaela, and 16383 for Raen. Or a difference of 62HP at level 60. So, you know. Basically nothing.