Oil cured is always a nice option. Once broken in, there would really be no difference. There really is no wrong decision between those two. (Except, of course, not buying at least one of them).
I love Rinaldo and I am very happy with Caminetto so far. If I had to go with one of the three, it would be Rinaldo. Caminetto and Castello would be neck and neck for second of these three.
I don't want to be an enabler or anything, BUT...Pull the trigger...I don't think you will regret it. You can always rationalize it later. Seriously, if you miss out on this one, they make great pipes all year long, it won't be very long until one you love just as much comes along. (As a side...
Up to now I have Radice, Ser Jacopo, Mastro Geppetto, Ardor, Rinaldo, Caminetto, Cavicchi, L'Anatra, Jacono, Castello, Savinelli and Barontini. I suppose it's safe to say I am thoroughly pleased with Italian Pipes.