Lapras vs Cloyster

Cloyster for DPS, Lapras for TDO.

Jynx!
Seriously, destroys either of them on offense, Frost Breath/Avalanche combo does 20% higher DPS than the best Cloyster, 32% more than the best Lapras. I've got a level 30 Jynx with 14-15-15 stats that just shreds 3000 CP Dragonites, in a flash.

But if I had to choose among the other two I'd go Cloyster offense, Lapras defense. Cloyster is strange, has fantastic D but terrible stamina. Lapras is just so slow to battle with, time matters

Sadly I would say neither.

Only Articuno or Piloswine has seen any sort of competitive utility in raids. Arguably maybe jynx as well. If you have good ones they double as dragonite counters or future dragon bosses. Lapras and cloyster are just in the middle and a bit meh.

Lapras. My favourite pokemon =]