If I can get the bees to take it quickly enough, I prefer to give them the syrup and let them store it. They will invert some of it with enzymes and it will be better feed and it will not crystalize as quickly. But any syrup or sugar is better feed than nothing.
Of course, it will go in more quickly if you put it in the drawn comb.
Also, sometimes it gets too cold for the bees to take the syrup. If you have cold nights sometimes the syrup is too cold for them even though the air has warmed up, because the syrup takes a lot longer to warm up. Sometimes I warm the syrup back up in order to get them to take it. Syrup shouldn't be too hot for you to put your finger in and leave it in or it will burn the bees trying to drink it.
Also, keep in mind, they may not build comb when the weather is colder, so they need drawn comb to store the syrup in.
Of course, it will go in more quickly if you put it in the drawn comb.
Also, sometimes it gets too cold for the bees to take the syrup. If you have cold nights sometimes the syrup is too cold for them even though the air has warmed up, because the syrup takes a lot longer to warm up. Sometimes I warm the syrup back up in order to get them to take it. Syrup shouldn't be too hot for you to put your finger in and leave it in or it will burn the bees trying to drink it.
Also, keep in mind, they may not build comb when the weather is colder, so they need drawn comb to store the syrup in.