HTC TP 6850 W 6.5 & Energy one and the same?

[md80boy]

I just got the HTC TP 6850 on Sprint almost new, but it is stock. I just joined and am a complete noob ad will read as much as I can before I post anything else...but:
Are the Windows Mobile upgrade to 6.5 and Energy ROM one and the same?
I was under the impression they are not, but myabe if I unlock the phone and flash in a new ROM, that new ROM would have 6.5 in it. If thats not right where can I get the 6.5 ROM, or even should I? Which should be put in first, the ROM or the W6.5?

Any guidance is appreciated. I have never flashed a phone before so a lot of terms will be new to me. The only exp I've had is with WiFi routers where I flashed in the DDWrt to my router!