I think the difference between the two is that cuteloom forgoes an extra attack for leech seed, whereas subpunch uses either SE or Seed Bomb
Edit: for this team this is what I have
Starmie @ Life Orb
Ability: Natural Cure
EVs: 4 HP/252 Spd/252 SAtk
Timid nature (+Spd, -Atk)
- Hydro Pump
- Ice Beam
- Thunderbolt
- Rapid Spin
Good coverage + power with Rapid Spin to keep SR off..... maybe we should reconsider using this as a starter and use something that doesn't lose to the current metagame(known as ScarfTar).
Yanmega (M) @ Life Orb
Ability: Speed Boost
EVs: 104 HP/152 Spd/252 SAtk
Modest nature (+SAtk, -Atk)
- Bug Buzz
- Air Slash
- Hidden Power [Ground]
- Protect
Max Sp. Attack for sweeping, Dual STAB, HP Ground to hit Heatran/ Magnezone/ some other steels, Protect to scout and ensure a chance to sweep. Speed hits 264 which, after a Speed Boost, beats all base 130's. Rest went into HP for random bulk.
Nidoking (M) @ Nothing
Ability: Poison Point
EVs: 252 Atk
Lonely nature (+Atk, -Def)
Earthquake
Needs max attack to hit blissey, and needs the sp. defense to come in a couple of times. EQ 2HKOs blissey and provides the main STAB attack: but what do I do with the rest?
Breloom (M) @ Toxic Orb
Ability: Poison Heal
EVs: 72 HP/252 Atk/184 Spd
Adamant nature (+Atk, -SAtk)
- Seed Bomb
- Stone Edge
- Spore
- Mach Punch
Seed Bomb for primary STAB, SE to hit common switch-ins, Spore is gay and Mach Punch for revenging/ checking threats. Max attack with 222 speed to beat adamant T-Tar. Rest was put into HP for random bulk(like Yanmega).
Heatran (M) @ Shuca Berry
Ability: Flash Fire
EVs: 4 HP/252 Spd/252 SAtk
Timid nature (+Spd, -Atk)
- Fire Blast
- Earth Power
- Stealth Rock
- Explosion
I decided that since we have Nidoking coming into Blissey all the time we didn't need to rely on this to OHKO her: meaning we could keep the bulk and use the resistances available. Fire Blast + Earth Power provide good coverage, where SR is for the first switch-in. Explosion provides the final bang, killing stuff.