Congrats on the new eGo.
All parts are interchangeable between the eGo and the Riva 510. (They have recently come out with a Riva that is
threaded to take 901 atomizers but that does not affect the battery connection.)
I have both the eGo and the Riva and think they are both fantastic, but I definitely prefer my Riva. To me, they are two very different products.
The Riva provides a much harsher vapor (in a good way) and a stronger throat hit, it knocked my socks off the first time I hit it. Either the battery provides more power to the atty or the slightly tighter fit of the cone warms the air better. I don't know.
The eGo has, in my opinion, a much better build quality. After two months of use, my Riva looks like I've been using it for a year. My two eGos look brand new. That problem could just be due the to way the gold titanium finish my Riva has was applied, I had the same problem with titanium finish peeling off one of my Joye 510s.
I may have gotten a bad finish on mine, I have never seen a similar complaint from anyone on this forum as to the way the Riva wears.
Also, the cone threading on the eGo is much smoother than that of the Riva.
For me, the most important part of rating a PV is the quality of the
vape I get when using it. Hands down, the Riva wins out.
I highly recommend getting a Riva to try. You'll love it as much if not more than the eGo.
As to drip tips, I still have not tried them.