What are differences between Master Summoner and Occultist?

[EpicFail]

I'm trying to decide between the two and have never done Occultist before. Let's take as given that I want to primarily summon, we have two or three fights per day usually, we have 20 point buy, and start at 1st level and go to about 14th.

All Pathfinder published is ok.

Master Summoner can spam ungodly amounts of critters, but with rare exceptions that's not what I like to do. There's a handicapped but handy Eidelon. Spell list has some gems that come early. Summoning feats are class features(!).

So what does Occultist, archetype of Arcanist, bring to the table to compare with that?

[shroudb]

From a very quick look:

Occultist has MORE free summons at higher levels, he just can't have them out simultaneously (but he can have the out simultaneously with normal cast SM)

Occultist has familiar

Occultist has SR

He also has some tricks through exploits (good dispel ones p.e.)

But mainly:
9th lvl spellcasting compared to 6th.