nd if I remember, it was pure Google flavor and got updates directly from Google
It was pure Google, but Google had to go through Verizon to push updates. This phone developed a bad reputation for updates as it was far behind the GSM Galaxy Nexus. In fact, last I heard was that the Verizon variant wasn't even getting Android 4.3.
Is this phone basically the same concept or is it just another Verizon phone where you wait a while to get the latest Android version for months
It's mostly stock Android, so updates are very fast. Motorola has also done a good job of navigating Verizon's update process. Here's some comparative timelines as per Motorola's website (using the 2013 Moto X).
https://motorola-global-portal.custhelp.com/app/answers/prod_answer_detail/a_id/94927/p/30,6720,8696
Received Android 4.4 11/2013. This was the same time as the unlocked model and within 30 days of the Nexus 5 launch.
Skipped 4.4.1 (not all minor updates are needed or will be pushed).
Received 4.4.2 in 2/2014, same month as the unlocked model. This was within 90 days of the Nexus 5 release.
Skipped 4.4.3 (released 6/2014 for Nexus 5 and unlocked Moto X)
Received 4.4.4 in 7/2014 (within 30 days of Nexus 5)
So as you can see, updates for the Verizon branded Moto X have been very fast. However, many updates will be skipped as not all point releases are major enough to warrant a big push.
Also, does Verizon directly sell the same phone in developer version?
There is a developer edition for the 2013 Moto X on Verizon, but they're harder to come by. If you can find one, and you want one, grab it while you can. I don't think Moto is selling them on their site anymore, but I could be wrong.
BTW, Verizon will not have a developer/pure edition of the 2014 Moto X, but due to requirements attached to part of their LTE spectrum, their Moto X variant will be sim unlocked. You'll still have the bloatware and locked bootloader, but at least you can move your phone to a GSM-based carrier in a pinch.