Earphone Studio Power Mv / OHM

TEMPO EARBUD 

      Actually i do not know too much about earphone or headphone technically.

      As per your reviews  and support rating  i think it is  best place to open Questions to get   required  answer Which will help me for further Solutions

  AM currently using sansa clip  plus 8gb  and  i am interested  to buy earphone

 from given two orders

  First one is

Philips

SHM3100U

philips Notebook headset SHM3100/97

Features

·         Highly sensitive microphone

·         Neodymium magnet

·         Optimal ear bud size

Specifications:

Sound

·         Frequency response: 12 - 20 000 Hz

·         Impedance:  16 Ohm

·         Maximum power input: 50 mW

·         Sensitivity: 106 dB

·         Sensitivity microphone: 80-15000Hz, -42+/-3 dB

Connectivity

·         Cable length: 2 m

·         Connector: 2 x 3.5 mm

And Second One 

JBL Tempo Earbud 

JBL Tempo Ear-bud High-quality Earphones

Features:

·         Comfortable fit earbuds-foam cushions included

·         15mm dynamic drivers for clear, full-range reproduction

·         Powerful, clear JBL sound with exceptional bass

·         High-performance 15mm drivers

Specifications:

·         Frequency range: 20Hz-20kHz

·         Impedance: 32ohms

·         Sensitivity: 113dB

·         Max Input Power: 4mW

·         Cable: 1.2m(3.9ft)

·         Plug: 3.5mm (1/8") 

 so which one is best as per technically point of view

Technically specs affect sound performance quality  such as ( impedance: 32ohms vs 160hms) or power input mv 

 Max power input does drain efficiency of battery ? flows ? continuously (4mv jbl and philips 50mv)

 Which one is better ? as per your suggestion.

           your time is really important for me 

 thanks

iarmstrong