Is HTC one X AT&T and HTC one XL same?

Question

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

HTC one X AT&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&T One X) ". This tend to think me whether these two are same.

Android 4.2.1 AOKP Custom ROM for the AT&T HTC One X

Answer 1

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:

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

Sources:

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

Answer 2

Nope, both have different features, and are not the same.