According to my knowledge some differences between the vi-rs and rs
Both the EK3 and the ES3 came out with sporty sedans called RS however the EK3 was called VI-RS and the ES3 was just called RS (no vi name for it)
The VI-RS has a d15b 3-stage vtec engine which produces 130ps while the RS has the D17A engine which produces 130ps as well
The D17A engine is not considered a proper VTEC as it doesn’t change cam profiles like the d15b found in the EG8’s and EK3’s thus it has a lower redline and better low end torque and is excellent for day to day traffic running but dull when it comes to straight line perfoamnce pretty much similar to what u find in the corollas and sunnys.
The VI-RS with the D15B has crap low end torque but excellent power up there all the way to the red line (7600rpm) and with simple mods like intake/exhaust it makes a world of a difference in power.
The es3 rs has a shorter 1st and 2nd gears compared to the vi-rs but is a sitting duck when it comes to 3rd as its bloody long.
The ES3 rs has factory defects and its market is not that great at the moment for ex the steering rack has issues, the EPS malfunctions, the crank sensor is supposed to blow and the dash rattles like a bitch.
I would say the ek3 vi-rs is a much better car than the es3 rs.