4g or LTE???????

Hi,well,my question is this:

I've flashed my Xperia X with the .277 firmware in order to root,so i picked up a generic one,to be more specific i have this on my phone right now: F5121_Customized GEL_1302-6571_34.0.A.1.277_R5A

i did'nt noticed it,but now the signal shows LTE,when i had the previous firm it showed 4G,also when i make a phone call the signal changes to H+ or 3G.

So which one is the best? i've searched but i'm still confused,and,yes my operator supports 4G and LTE aswell.

Thanks.