mobile

So I'm planning to root and flash a custom lollipop ROM on LG G3 (F400s and build number 10t). I've rooted and installed custom ROMs in a couple of devices before, but apparently there's a number of versions of this device. So my question is, does the process of rooting/installation of custom ROMs vary from one version to another or is the same for all versions? I've seen some tutorials for the D855 version, all I want to know is can I go through the same steps for the F400S version. Is ChupaChups ROM worth trying? Also, do I have to download a separate gapps if I plan to flash the ChupaChups ROM? Pardon the noobness fellas.

Edit: build number.