Scientifically speaking the comparison chart for the PCM option has more green ticks than the LXP one.
It has 3 more plug-ins, 700 more presets as well as 47 flexible space rooms absent in the LXP range, add to that the extra cost will give you more bragging rights and it becomes a no-brainer.
Having said that you may well find the 3 set-ups you end up using as your goto Plate, Hall and Room sends from the LXP range and save yourself a pile of cash.
Who knows? Reverbs are a funny business, I only really find out what I get fed up with after a period of prolonged use.