I presently have both. A new Spolar running hydraulics and the 800 Plus also running hydraulics.
I am a P/W Distributor so I am quite familiar with them, and have had a total of three of the Spolars. In fact, I have loaded a total of... just looked, 259 shells on the new one. (No, no reason why no more, other than I've just been shooting new stuff).
I like them both, they both have advantages and disadvantages. I think the primer feeds on both machine are a concern for me from time-to-time. I ended up building some electric vibrators for the P/W machines, and then a few guys asked me to build a replacement for the Spolars. I quite building them altogether as they took so much time.
I used the first Electric-Drive at the factory and was instrumental in getting these going. I sent my P/W Automate to P/W to look over, and following Automate's sale to Mec, the Electric-Drive was a Godsend. I have, however, have had a few guys trading back in their Electric-Drives for the hydraulics. I can't remember why.
The P/W Electric-Drive is available for the Spolar and Dillion's as well.
Whiz