Elliptic Ruijsenaars-Schneider and Calogero-Moser hierarchies are   governed by the same r-matrix
  We demonstrate that in a certain gauge the elliptic Ruijsenaars--Schneider models admit Lax representation governed by the same dynamical $r$--matrix as their non--relativistic counterparts (Calogero--Moser models). This phenomenon was previously observed for the rational and hyperbolic models. 
Yuri B. Suris (University of Bremen)