Hi!
@BayArea ,
No 4G = 4G - and LTE = 4G.
The thing is names are different and the frequency's LTE and 4G are using.
In Canada or the US carriers will tell you more about LTE and in Europe we are telling you more about 4G.
Europa:800/1800/2600 MHz
Amerika:700/800/1700AWS/1800/1900
LTE-A is called in Europe 4G+ Vodafone is already testing it in Amsterdam. And about the HSPA+ that's more for 3G but 4G and LTE are in fact really 3.9G really wanna see 4G a travel to South Korea could tell you more about it! A travel to South Korea about 6 years will tell you more about 5G while in the rest of the world 5G will be 4.9G :p.
If you really wanna read something die-hard about 4G and LTE:
http://nl.wikipedia.org/wiki/4G#Downloadsnelheid_4G_.28LTE_Advanced.29 Btw: Let me know if i said something wrong ;). Always learning!