1) Probably.

2) No.

 

The TMO version does not have a locked bootloader

T-Mobile Moto X Added to Motorola Bootloader Unlock Program | Droid Life

 

The tmobile edition tends to get updates from Moto AFAIK. (It was the first to get the first camera update, and second to get KitKat).

T-mobile doesnt sell the t-mobile edition, you can only buy it from Moto.

What network are you planning to run the TMO edition on? For all intents and purposes it is roughly the same as the GSM dev edition except for TMO, you can use Motomaker.

The only difference is the colors

https://en.wikipedia.org/wiki/Moto_X#Variants

The ATT version supports LTE in band 7 (1700) while the dev edition uses it as a HSPA+ band




All variants support four 2G GSM bands 850/900/1800/1900.

XT1053 T-Mobile US, Developer Edition

(GSM) Quad
(UTMS) 850/900/1700/1900/2100
(LTE) 2/4/17
compatible with AT&T Mobility and T-Mobile US


XT1058 AT&T Mobility, Rogers,...

(GSM) Quad
(UTMS) 850/900/1900/2100
(LTE) 2/4/5/7/17
compatible with AT&T Mobility and T-Mobile US



LTE bands in the US go something like this:

LTE Band #/ Spectrum block / Carrier

2 (850 MHz) TMO
4 (1700/2100 MHz AWS) TMO, ATT, VZW
5 (850 MHz) ATT
17(700 MHz B) ATT
17(700 MHz C) VZW



UTMS/HSPA+ bands in the US go something like this:
https://en.wikipedia.org/wiki/High_Speed_Packet_Access

ATT
850, 1900

TMO
850, 1700, 1900

VZW
Not applicable