>>714357716my man. vita never ran ps2 games on full power.
just look at official sony ports of rachet and clank, gow and jak and daxter games.
vita was the weaker system, so less special effects make sense.
though we are not talking about special effects. we are talking about face details and expressions, which as I said, dont matter as much in vita's tiny screen compared to a big tv. they can be less detailed but higher fidelity since vita has more pixels but is much smaller.