Not as GSMArena recalls it.After checking, I've seen that MT4G is also 802.11a capable (not only b/g/n like our Sensation) which means it's a dual band device.
Sensation on the other hand is not.
Straight from GSMArena:
HTC Sensation
GPRS Up to 114 kbps
EDGE Up to 560 kbps
3G HSDPA 14.4 Mbps, HSUPA 5.76 Mbps
WLAN Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi hotspot
Bluetooth Yes, v3.0 with A2DP
Infrared port No
USB Yes, microUSB (MHL) v2.0
T-Mobile MyTouch 4G
GPRS Yes
EDGE Class 10, 236.8 kbps
3G HSDPA, 14.4 Mbps; HSUPA, 5.76 Mbps
WLAN Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi hotspot
Bluetooth Yes v2.1 with A2DP
Infrared port No
USB Yes, miniUSB v2.0
Exactly the same
I believe it's software. Which means a custom ROM or radio could fix it.