You cannot compare those numbers. Cost of living is very different in Germany and the UK compared to Russia. Personnel costs make up for most of the German budget and a Russian soldier earns only a fraction of a German soldier.
Germany will have greater personnel cost, yes. In other areas, Russia will have a greater cost burden. For example, they don’t share defense resources with other nations (I.e. no. NATO equivalent).
The person you’re replying to is simply stating that Germany’s higher personnel cost does not nullify the effectiveness of relative strength of the German military versus the Russians.