In War thunder bombers can be improved to carry bigger bombs. But sometimes bigger bombs means a smaller total explosive mass.
For example on the Italian BR.20 DR you can take 4*250kg instead 12*100kg.
It is an improvement in the research tree but to me taking the big bombs seems worse than the small ones.
I would have less explosive mass if I want to bomb bases and it would be more difficult to bomb a long line of vehicles, so is there any benefits in taking these bigger bombs ?