Alakazam - Psychic and Future Sight

future sight is better than Psychic in every way, although Psychic still very good. Unfortunately all the Abras I've evolved in Gen2 have learned Confusion-FS

IMO ur PC/P Alakazam is enough. You have a pretty good Psychic attacker in a very high level so i dont see reason to start building other atm UNLESS you have stardust a lot.

It's too costly of an improvement imo & he's not the only viable psychic attacker available anymore. I'd stand pat and wait it out to see if physic gets fixed.

I would stick with the one you have. Hopefully the next time they update moves they will make psychic a 2 bar move...it was kind of an odd choice to keep psychic a single bar move and add another move that is basically the same, only stronger...

Of course FS is way stronger but I think what you miss in your question is that there is another psychic attacker now with espeon who can learn FS as well. I habe an PC/P Alakazam too and thought about going for another one to get PC/FS but in the end for me espeon is the better choice, easier to get a high lvl/high IV one and it's really a matter of preference which quick move you prefer on her, since both are strong, so the odds of getting a good moveset are 33% vs 16% for alakazam.

I just evolved an 89 IV one with PC/ Future Sight (1627 CP). Is it worth the 122 candies and 130k stardust to get him to the same level as my other one?

If you can afford it - i encourage this decision. Maybe level 30 will be sufficient to test if its worth it.

Would be helpful if anyone has used both and can tell a noticeable difference between the two.

I do not have both, but the table says, that PC/FS deals 12% more damage. This is huge.

No its too small unless your a collector. On attackers, especially common ones, evolving high level 28+ is better than obsessing over IV's. Its been proven IVs matter very little in gym battles, level 30 and moveset are the key factors. If you looking to efficiently fight in gyms powering up high IV low level attackers will make you ineffective since your defenders wont be getting any dust. Id wait for an 800 CP plus Abra and hope you get that same moveset.