I find both to be a waste.
If there is natural pollen available they will ignore the pollen substitute.
I have developed so good substitute from soya-pollen-yeast thay bees continue substiutute eating up to apple blooming. Then they get so good variety of pollen that they need not patty. Weather are so good too that out temp does not hinder pollen gathering.
If you try to feed syrup when it's cold they can't take it. If you get a warm spell and they do and they brood up too early they get caught on the brood and starve. I find it's much better to let them stay in synch with their climate and their flows than it is to fool them into doing what their instincts correctly tell them not to do...
Syrup feeding does not add brood rearing in Spring. The limiting factors are the number of nurzser bees and cluster size.
Suga feeding only fills combs.
Beehive must allways have two full frames of honey or sugar surup. It is 5 kg food.
If there is more food frames, I take them off. So queen has space to lay.