Although my compare/contrast assessment based on considerable experience & time spent enjoying both the E-Nano and Underdog (older & newer heating cores) differs greatly in almost every regard to the experience of this reviewer (e.g. heat-up time, technique, vapor production, perception of build quality, etc.), I sincerely appreciate his thoughtful generous first effort in bringing this contribution to the FC community. With more time given to this reviewer's exploration, experience, and reflection, I look forward to follow-up updates, that should, I would expect, evolve to eradicate many of the disparate differences he personally found, ultimately sharpening subjective impressions to more objective assessments. This is how it usually happens when building on experience and keeping an open mind and enthusiasm for learning.
