2 week old Coturnix should be around 90 degrees, Bobs at 97-95 for week one. Improper brooder temps and crowding are usually the reason that babies die in the brooder. Sounds like your Coturnix could be over heating. If they are on the cooler side of the brooder, they are too hot. Make sure you are using a good thermometer. One that you know is reading correctly. Even a few degrees off can kill young babies. Keep the heat off to one side of the brooder, and place the thermometer directly under the heat source on the floor. The bobs may be be starving from uncrushed food.
Keep the food and water off to the other side of the brooder so they babies have to leave the heat to get to the goods. Also there will be places along the sides to cool off. Make sure you have at least 1/2 square foot per bird in this brooder. Do not cover the lid of the brooder with anything but a screen or wire for good heat and oxygen exchange.
Unless you have completely disinfected these spruce branches, get rid of them. If you cut these from a tree outside were wild birds have been using, there could be bacteria and mites in them. Scrub them really good and use bleach on them if you are going to use them. And this goes for adult birds as well. I doubt this is the problem, but everything is suspected when you are losing babies.
All this being said, I think you need to lower the temp to around 92 to keep each species happy. The bobs need their feed crushed at this point still. Keep paper towels down for another week and sprinkle food on the floor near the feeder so they can find the food. Make sure the water is accessable and dip everybodies beak in it so they know where it is. Give them plenty of space, 1/2 square foot per bird and make SURE your thermometer is correct. Get a new one from a good brooder supply if in doubt. I think your thermometer is not correct, at leas this is what I would think if this were happening to me.
Also, disinfect your waterers once a week with bleach and vinegar and give them fresh water daily to prevent a bacterial outbreak.