The difference is more like $800. Most people add the optional bullet trays, the raised press stand, and the optional handle. In the whole scheme of what we spend on this hobby, $800 isn't that much.
I agree the case feeder is exactly the same. The added complexity comes from the rest of the caliber conversion.
I tried every fix possible for the 650. In large cases, the spill isn't much of a problem. The problem is in small cases like 380. I've yet to find a solution.
Never payed money for a tray to hold bullets on any of my presses even before bullet feeders would be useless with them.
Some guys don't even have $800 in all their reloading equipment but that difference would still be another press or zero conversion time going from one caliber. Actually 3 total if you just dropped the same case feeder on all three.
Smallest I have loaded was 9mm but using 10 grains of HS-7 it gets pretty full.
Closest I had to a bullet tray was a bracket I made that went on a strong mount (for a reject tray on my first bullet collator). Just a bent section of metal that holds a standard akro bid on the right side.