I made the comparison between Simipour and Golduck due to the fact that they rely on the good speed (well for Golduck it's merely above average) to function well, as their low bulk means they do not take kindly to neutral hits unlike Samurott (ex: support Armaldo's X-Scissor). The fact that you're comparing Golduck to Samurott is just...I don't even know what to say. Well a lot of things actually.
The point of this set is to imitate samurott but still outspeed max 70's (and standard adamant skunk) so you can actually outspeed samurott and ludicolo. With a nature that boosts it's sp.a, golduck actually reaches 2 more sp.a points than timid samurott and still outspeeds him by a couple of points.
Golduck's main advantage over Samurott is its ability to outrun base 80s, regardless of their nature. The
very slight boost in power and speed matters little if positive base 80s will still annihilate you. If Samurott isn't running a nature that boosts offense, it will be boosting speed, which still puts it above neutral base 80s, meaning Golduck's advantage over Samurott is moot and results in noticeably less bulk.
If you argue simipour outclasses this set, you should check simi's defences as well as it's usage compared to samurott's, the poke this set is meant to compete with.
My argument compared Simipour's usefulness to
Golduck, not Samurott. It still has advantages over Samurott, namely its fantastic speed, but so far my thoughts in terms of reliability are Samurott>Simipour>Golduck.
I'm suggesting to use golduck over samurott who is chosen over simi for his better bulk and access to megahorn and aqua jet
I'm not sure where you are trying to go with this. Are you trying to imply that Golduck is chosen over Samurott because Samurott has Megahorn and Aqua Jet which Simipour does not have? What does Simipour have to do with comparing Golduck and Samurott?
you'll understand that with + sp.a nature golduck acheives about the same as special samurott but with enough speed to outspeed samurott and ludi. The point is not to lure in samurott counters but to use golduck over samurott on your team.
Yes I'm aware of that, but Golduck does not fare any better against opposing Samurott than your own Samurott, while Samurott can destroy Ludicolo with Megahorn should it win the speed tie (most Ludis run Modest anyway). While Golduck always outspeeds Ludi, it still loses one-on-one simply because unSTABed Signal Beam isn't doing much to Ludicolo's better defense, and any damage Signal Beam did would be healed off by Giga Drain anyway. Yes it can revenge weakened Ludicolo, but that is easier said than done against an opponent with recovery and/or has demolished your team by the time you get it low enough.
Cloud nine and swift swim also have their utility
Against what? Golduck is beaten down by Sawsbuck and Ludicolo, two of the most common weather sweepers in the tier. What's that, Victreebel and Gorebyss? A Scarf Simipour can revenge kill them regardless (including Smashed Gorebyss, which Duck is helpless against), and has much more utility with fast Hydro Pumps than the ability to neuter weather
only when in battle.
Really, the main turnoffs to using Golduck compared to Samurott and/or Simipour are
This is a pretty big deal. The ability to OHKO Ludi, a Water-type's worst nightmare and keep it at bay is what makes Samurott much more difficult to deal with. Ludi only has to worry about not coming in on Golduck's Signal Beam and threaten a OHKO.
Samurott and Simipour can have extra emergency power which Golduck can't dish out (not to mention it's the weakest amongst the three), meaning Golduck can't hit any harder than it already does.
Its one-dimensionality is a big issue. Samurott's different sets have radically different counters: you can't revenge kill SD Samurott with ease, while Tangela and Alomo worry about specially oriented sets. Simipour can run NP sets that have both wallbreaking and sweeping potential, while its Choice Sets are good because it has arguably the best mix of initial power and speed among all NU Water-types. Golduck....isn't that good of a Samurott wannabe. Special walls like Regice, Lickilicky and Mantine have no second thoughts about switching in, and unless Golduck runs something like Cross Chop (Samurott has Superpower as that nail in the coffin), Golduck has no real way of getting past these threats or surprising them. Samurott 2.0? More like Samurott 0.7.
That said, I retract my statement about Golduck not having boosting moves, completely forgetting about Calm Mind. Golduck's usable speed can actually make this viable, as well as its access to Encore (Samurott has it too, what a dick XD). Really, as opposed to try to copy some of the other Water-types, Golduck should try to make use of what is unique to it and hopefully, establish a better niche for itself. Golduck's isn't bad, but if it can't differentiate itself from the numerous Water-types in NU, don't expect it to see much use.