I have a question about su 39

I would like to buy the su 39 in order to grind russia with it, i would like to use it in nuclear escalation, but i was wondering about the br of the anti aircraft i would face, bc im used to play with su 30mkk with a br of 13.7, where the anti aircraft is VERY annoying, so if i play with the su 39 with a br of 11.7 i may face different SPAA’s? For example, instead of the it0 i would face the flakpnz or wathever is it called, its like a lower tier german SPAA?