Upgrade from Sumiko Blue Point #2

 On the market for a cartridge. Considering Audio Technica.A little confused on the product line up difference between at33 and oc9 series. Anyone have experience with the new oc9x series vs oc9 iii. I would imagine e few in the new series would be an improvement but not all based on the fact price points they cover widely. Looking to upgrade the blue point no2 on my Pro Ject RPM5. Looking for a bit more inner detail, bigger soundstage and overall sq, don’t want to give up warmth. Rest of system is Pro Ject phono ds, Levinson 380s, Levinson 334 and the late 90s kef ref model threes. I noticed the original retail of the oc9 iii was over 1k at one point and seems to spec better in channel balance and separation. The at33 series seams to occupy similar price points are the voiced different? Thanks for any input. Upgrading my phono stage to Pro Ject RS also considering Ortofon Quintet bronze or Black.