At first lets look at the version differences
Bluetooth version 1.2 :max speed 0.7 MB/sec
Bluetooth version 2.0: max speed 2.1 MB/sec
Bluetooth version 3.0: max speed 2.1 MB/sec and 24 MB/sec if using special amplifier
Bluetooth version 4.0: max speed 2.1 MB/sec and 24 MB/sec if using special amplifier
Then there are the bluetooth classes depending on the power usage
Bluetooth class 3: max range: 5 m and power usage 1 mW
Bluetooth class 2: max range: 10 m and power usage 2.5 mW
Bluetooth class 1: max range: 100 m and power usage 100 mW
So if you want to know what is the range, power consumption and data tranfer speed all you need to know is the class and the version of your bluetooth device. Now lets see what happens with Wi-Fi
Wi-Fi is much more suitable for larger home or office networks than bluetooth cause it offers more speed and range. Wi-Fi devices are categorized as follows
Wi-Fi 802.11: Release Date=Jun 1997, Operating Frequency=2.4 GHz, Bandwidth=20 MHz, Max data transfer speed=2 MB/sec, Max MIMO streams=1, Max indoor range=20 m, Max outdoor range= 100m
Wi-Fi 802.11a: Release Date=Sep 1999, Operating Frequency=5 GHz, Bandwidth=20 MHz, Max data transfer speed=54 MB/sec, Max MIMO streams=1, Max indoor range=35 m, Max outdoor range= 120m
Wi-Fi 802.11g: Release Date=Jun 2003, Operating Frequency=2.4 GHz, Bandwidth=20 MHz, Max data transfer speed=54 MB/sec, Max MIMO streams=1, Max indoor range=38 m, Max outdoor range= 140m
Wi-Fi 802.11n(1): Release Date=Oct 2009, Operating Frequency=2.4 GHz, Bandwidth=20 MHz, Max data transfer speed=72.2 MB/sec, Max MIMO streams=4, Max indoor range=70 m, Max outdoor range= 250m
Wi-Fi 802.11n(2): Release Date=Oct 2009, Operating Frequency=5 GHz, Bandwidth=40 MHz, Max data transfer speed=150 MB/sec, Max MIMO streams=4, Max indoor range=70 m, Max outdoor range= 250m
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