I needed the light outside, so the orange C7's without the flicker were my best choice.
Once you convert your lanterns to electric, changing from flicker bulbs to the C7's is easy enough. You can get the C7's 6 for 99 cents here. I would build your lanterns, and test them in a dark room. I had all six running in my house with the flicker bulbs, and it looked okay. Once I tried them outside in the yard, they looked lost.
If you run several lanterns off of one flicker circuit, they are all going to follow the exact same pattern. I tried it this way, and did not like it.
If you are depending on these things to provide any useful light, you'll find the flicker bulbs probably will not suffice in a larger area. If you are using them more for props just to set the atmosphere, I think the flicker bulbs would be fine. I did not frost my globes when i was using the flicker bulbs. I simply dusted the globes with a flat black paint to dirty them up a bit.