Look you cannot compare BZA and VSKP. BZA is one of the most important junctions of the country where the trunk routes amalgamate. Hence it is bound to have much more passing trains than VSKP. BBS is capital of odisha and much more importantly all the PURI bound trains pass through BBS, hence it also has more number of passing trains. But in terms of number of trains originating and terminating, VSKP is probably ahead from both BBS and BZA.