Yeap that is correct. The lift between the low cams and high cams are almost the same, difference mainly in duration unlike the normal mivec cams where you can see difference in lift between the low and high cams. Basically the low cams is already similar to high cams in some cars. I'm running standalone now and compared to my 4g18, the low cams are definitely more aggressive than my 4g18 jasma 'high' cams which can be seen in the lower vacuum numbers, lumpy idle and the effort required to tune for 'normal' driving.
You got yourself quite a deal by the way, the rs engine is pretty hard to come by and not many half cut shops know how to see the difference. Like in my case I got a mivec rs enjin lantai with a Cusco lsd inside for the price of a normal mivec.
Also note that the mivec rs only comes on the ck/cj(terbalik/waja) version and not the ca(wira) version.
One last thing, the rs also comes stock with a power steering cooler which goes all the way to the passenger side. The power steering pump and rack is also of a different p/n if not mistaken if you were to get the entire half cut. With my Cusco LSD, my power steering fluid was boiling without the cooler on touge runs and I recently just installed an oil cooler for the power steering system, yet to test it though.
Edit: additional note, if you were to do a top or full overhaul next time, ask the mechanic to let you hold the titanium intake valves. If you had held a normal valve before, your mind will be blown on how light it is