It's all very mix and match with them. The Flora pattern is the most common regular army pattern, then the more special units such as VDV, Alfa, Vityaz, et el, have some more exotic stuff like the Kamysh pattern for example. Often it's a case of what the storeman's got for you.
www.russiancombatgear.com to see all the different things. Hope that's not counted as advertising- it's only intended as a reference.
I have a set of Russian BDU's and find them to be well made except for the buttons. They are week and need to be resowed.