If this CDMA-only Motorola Triumph phone were on Metro, the LTE + CDMA LG Bryce/Esteem would kick this non-LTE's butt (as long as you stayed in LTE reception areas). But if you are comparing this Motorola Triumph phone running on Virgin to LG Bryce running on Metro -- well, that's your decision. But Metro's LTE network is not bad. Most people are getting 2 - 5 mbps (2,000 - 5,000kbps).
Another consideration: Virgin's full 3G network (Sprint) is 90% nationwide, while Metro's LTE network is in 14 markets. (We Metro customers have capped CDMA roaming on Sprint, so we do have "nationwide" coveage, but it's not 3G data speed coverage; it's limited to the same CDMA speed we get on Metro.) If you do a lot of traveling, then Virgin with this Motorola Triumph would be for you. If you stay in your home area most of the time, and you have good LTE reception, then Metro with the LG Bryce would work well.
I am a long-time Metro customer, I have two Optimus M, and I will be getting the LTE LG Bryce/Esteem. But I have recommended Virgin to friends wanting Androids (like the Optimus) due to the "2G" CDMA speed Metro has. 100kbps is a LOT slower than 1,000 kbps on an Android.