The Pioneer4You iPV 2S comes with beveled edges so its easier to hold in the hand, and new screws that shouldnt strip nearly as easily, and even new buttons.

Specifications:

510 threaded connection;
Output Power: 7.0W~60.0W
5 watts modes option: 10W (0.1W increments / decrements), 20W (0.1W increments / decrements), 30W (0.1W increments / decrements), 40W (0.1W increments / decrements), 60W (0.1W decrements);
Output Voltage: 3.6V~ 8.5V;
Output Current: 1.3 Amps~25 Amps;
Input Voltage: 3.2~4.5V;
Atomizer Resistance: 0.2 Ohms~3.0 Ohms;
Efficiency: 93%;
Low voltage protection, low resistance protection, short circuit protection, reverse polarity and overheat protection;
High input voltage warning;
Click the power button 5 times to turn on/off;
Powered by 1 x 18650 battery (not included)