I would look at the info at the link below. I was asking for the same info last week.
https://www.indianagunowners.com/forums/ammunition_and_reloading/58201-lee_pro_1000_a.html
I have had my Lee turret press for about 8 months and love it and would recommend it to anyone starting out as a cheap way to start reloading.
But here i am wanting to go faster and being told Dillon but I am not sure which one I want. It does not seem like the square deal would be much faster that what I have. The only thing that is automated is the primmer loading and that works ok and somewhat fast on Lee turret.
So I look at 550 and 650 and trying to make sure I do not buy one and which i had the other. What are biggest reason the 650 over the 550. I see the 650 will load the cases for you. What else does the 650 do?
I should add that i mainly loading 9mm but could see me loading, 38, 40 or 45.