Choose SU. Its definetly the better option.
I find the SU 767 seats better than KLM and also the load factor in J on SU is less in comparison to KLM so the service shall be better too.
I fly SVO - FRU quiet often & they have A321 now a days however do not know about June 2009.
The SVO T3 will be ready & working latest by March 2009 & I have seen the blue prints of the project and can say the lounge's are going to be much better because they are going all out to be better than DME.