First off, please put the players involved in the title. Or I will kill you.
Second, this is a 'when now' trade, as in if you think you can win this season and need a starter to pad your team, then yes this is worth it.
Otherwise keep what you have if you have the patience to wait a couple more season. Ekman-Larsson is being hyped pretty hard right now, while Larsson has been considered (unfairly) as a dissapointment. At the very least, Ekman-Larsson's hype value makes him the most valuable player in this deal
***Non-Descriptive Thread Titles Killed My Wife and Ate My Children***
10 Team Roto Keeper League (G,A,PPP,SHP,GWG,+/-,PIM, SOG // W,SAVES,GAA,SV%,SO)
Full Keeper w/ Salary Cap [4C/4LW/4RW/6D/2G/5B, 82 gp per roster spot]
C: Crosby, Getzlaf, Ribeiro, Hodgson
LW: Ovechkin, Kovalchuk, Eriksson, Van Riemsdyk, Whitney
RW: Gaborik, Stewart, Read, Selanne, Alfredsson
D: Pietrangelo, Yandle, Edler, Wisniewski, E. Johnson, Whitney, Bieksa, Gardiner
G: Lundqvist, Bryzgalov, Schneider
Yakupov, Silfverberg, Bjugstad, Stone, Atkinson, J. Morrow, Palmieri, B. Smith, J. Bernier