This is a pretty relative question but I think it comes down to what you are looking for. With the ego-c you can buy replacement atomizer bases and with the bulli you need to wrap your own coil. I personally find the flavor to be somewhat muted compared to other things and when comparing the two against each other I find them similar in this aspect. For me the bulli takes a little more time to get broken in but that is true for any rebuildable atty (for me anyway). The bulli is very high quality especially if you get the stainless steel version. The ego-c is not junk by any means but it is more of a disposable product. If you have never tried this type of
tank system I would suggest buying an eco-c
tank atty to try it out and if you like it then buy a bulli. just my opinion.