An LR (low-resistance) atomizer on a 3.7V battery delivers an intensity of vaping experience (vapor, flavor, and throat hit) similar to a regular atty on a 5V battery. It all has to do with Ohm's Law: Watts (i.e., power) = Volts X Volts / Ohms (i.e., resistance). [There are other formulations of that, e.g., incorporating the current in Amps. But I prefer this streamlined version for this purpose.]
So, the higher the battery voltage, the greater the power. Also, the lower the atomizer resistance, the greater the power.
However, that version of the formula ignores the current (Amps) running through the atomizer. [Amps (i.e., current) = Volts / Ohms.] If it is too high (e.g., high voltage and low resistance), it can burn out the atomizer. That's why LR attys are not to be used on 5V or 6V devices ... and high-resistance atomizers should be used on 6V+ devices.
The 14500 battery (which starts at 4.2V fully charged) in Kent's Bartleby (or in most mods that use that batt) probably does deliver too much voltage to an LR 510 atty. The weaker battery (~3.2V) of the eGO may be just right for it ... as might the same 14500 in the DSE905 (which regulates the battery's output to a maximum 3.7V).
For example, I prefer using my regular 801 attys on my ProVape-1, but my LR 801 atty on my DSE905, even though both use the same 14500 battery. For me at least, the 905 is too weak for the regular 801 atty, but just right for the LR (which is too intense for me on the ProVape).