The 550 that I use is not auto indexing. I have never used a LNL so I can't make a comparison. I have seen a LNL in person at the store, and they look to be real robust and well made. What is the difference in price for the hardware to switch to different calibers? Plates on the Dillon vs the cost of the die collets on the LNL? Also, on the 550 I use, it is easier to buy a seperate powder measure for each caliber setup rather than moving the powder measurer around so take that into consideration as well. Is this easier on the LNL? I don't know. Maybe the Dillon is updated now as the one I use is about 10 years old.
JSF