I like OEL here. To me he is simply the more talented of the two. OEL is the go-to in the desert plus he and Yandle are a great PP duo. He also has a higher point upside than Dion IMO.
Dion certainly has the advantage in PIM and blocked shots but it is easier to find guys on the wire to pick up the slack in those cats.
For what its worth this is coming from a Leafs fan too.
13 team Roto keeper league 12 F, 6D, 2G, G,A,+/-, PIMS, Hits, TOI(D), GAA, SV%, (Forwards are forwards, no distinction between L,R,C)
F) Ovechkin, Stamkos, Kunitz, Parise, Byfuglien, Backstrom, Little, Gaudreau, Hudler, Brassard, Girgensons, Nelson
D) S. Weber, Phaneuf, Subban, Carlson, Josi, Vatanen
G) Rask, Jones