Wifi options - is there much difference?

I currently have a "g" wireless setup in my home, perhaps someday I'll get the "n" version. I'm trying to configure a T400 and there are four options that allow for "g" and "n" data rates:
ThinkPad WiFi (BGN)
Intel WiFi Link 5100 (AGN) with My WiFi Technology
Intel WiFi Link 5300 (AGN) with My WiFi Technology
Intel WiMAX/WiFi Link 5350 (AGN) with My WiFi Technology
Is there any special reason why the Intel WiFi Link versions will give me anything special with my plain-jane wireless router or the ones I'm likely to encounter at airports or hotels?
Also, if I want to play with NetStumbler or similar software, is one wifi option better than the others?
Thanks!

While I am not sure what the ThinkPad WiFi is (maybe an Atheros based chipset?), the three different Intels offered are actually different despite the similar names.
The 5100 uses a two antenna design and can offered up to a 300mbps raw bandwidth.
The 5300, on the other hand, uses three antenna, and thus can offer up to a 450mbps raw bandwidth.
The last one is simply the addition of WiMAX onto the card.
If you are simply looking for a card that connects well with your router and/airports/wireless APs, then I recommend that you get the Intel WiFi Link 5300 - in my experience, it has very good range and can detect wireless networks fairly well at weak signals. (Most airports / access points only use Wireless B/G)
I wouldn't expect anything "special" with the card when used with your router though, since the card will just default back to 802.11g mode. You might get better range when using this card, however...
Lastly, NetStumbler does not work when you are running Windows Vista Intel drivers - not sure about other chipsets, but if you are running Vista with Intel cards install - NetStumbler won't play very well with it... While you can try running XP drivers under Vista - things tend to crash if you try that.
As for "similar software", it depends on what you are trying to run...
I hope I answered some of your questions.

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Wifi options - is there much difference?

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