Is HTC one X AT&T and HTC one XL same? Just noticed HTC one X AT&amp;T and HTC one XL has got same configuration. Are those mobile same ?

HTC one X AT&amp;T vs HTC one XL (GSM Arena)

Actually, I read a article on which it was mentioned like " Android 4.2.1 ROM is cooked up for the HTC One XL (the AT&amp;T One X) ". This tend to think me whether these two are same. 

Android 4.2.1 AOKP Custom ROM for the AT&amp;T HTC One X
The short answer is: No, they are not the same.
The long answer is as follows:

At least for dimensions, they are not exactly the same (HTC One XL, to the right, is a bit smaller)

 

Also, from the comparison table you talk about:


HTC One X AT&amp;T wouldn't support HSDPA 900, while HTC One XL does.
HTC One X AT&amp;T supports 4G network with LTE 700 MHz Class 17 / 1700 /
2100, while HTC One XL does it with LTE 1800 / 2600.
HTC One X AT&amp;T supports Mini-SIM, while HTC One XL supports Micro-SIM.
HTC One XL has Stereo FM radio with RDS, while HTC One X AT&amp;T does not.
HTC One XL has 32 GB internal storage, HTC One X AT&amp;T has 16 GB internal storage.


Sources:


Left image: HTC One AT&amp;T at HTC US website
Right image: HTC One XL at HTC Australian website