Originally Posted by Fat BrianFantana
It's worth noting that CAP5s highly or fully invested in HP/SpD+ with ST ratings around the 235/240 mark running Sitrus Berries (or Enigma/Occa berries, I guess) are even covered against sun-boosted HP Fires - which won't 2HKO out of Sun and will trigger the Sitrus in it. As a bonus, depending on the specific ST rating CAP5 might actually have the liberty to drop a couple of SpD EVs to ensure that HP Fire brings it into Sitrus range, freeing them up for Attack or Speed.
Faster CAP5s with STs around the 200 mark can avoid the HP Fire 2HKO with Sitrus berries too - but this necessitates quite a bit of investment in both HP and SpD, which completely defeats the purpose of the extra speed in the first place. Occa sets would do the trick, but it's hard to imagine them being widely used.
In that sense, high Special bulk makes CAP5 a more complete Lati@s check than high Speed - whereas fast CAP5s fully invested in speed can be overcome by a Latios running the right (commonly used and competitively viable) move in the Sun, those that tend towards outright walling can potentially stop it in its tracks, sponging its entire movepool bar gimmicks like HP Bug. So I think brute tankiness trumps speed as far as countering Latios is concerned.
You are right that with Sitrus Berry and enough special bulk the CAP could handle even Sun HP Fire from Latios. However, i would prefer the CAP to be able to handle Latios with LumRest too, and this is one of the reasons i want such a fast spread. RestLum not only gives us reliable recovery that we can completely control, it also gives us status immunity, which is very precious for a Pokemon so weak to residual damage as this one. Don't forget it is one of the few defensive Pokemon that won't use Leftovers. With Sitrus Berry and a burn, as well as SR on the field, the CAP loses 25% of its health just for switching into whatever it wants to, and of 'course it suffers the burn effect, which makes it offensively useless. Factor in potential sand damage and you will realize that the residual damage rack up veeery fast. Not to mention that, with Sitrus Berry, in order to heal you must be below 50% health which won't always be possible and won't always be in your control. If for example your burned CAP wanted to switch into Politoed, but the opponent double switched on something that scares the CAP out thus forcing you out, the CAP just lost 25% of its health. Next time it probably won't be able to avoid whatever 2HKO from a strong special attacker you want it to, as it takes 25% just when switching in, and the damage from the two special attacks you want it to switch into. Not even Sitrus can save you from so much damage.
For this reason i would prefer to make a spread that favors the use of Lum Berry, which greatly increases the tanking potential of the CAP, and prevents any harmful status from ruining the CAP's day.
Also sorry guys if my post was ambiguous, i meant what Mario with Lasers said, which is ''doing those specific things we want it to better''. And thx MWL for the good examples you provided, because as it seems i am not the best at explaining things :D