No he doesn't love his brother, his brother was used as a beating stick agenst Phil for a long time that's why he has this need to feel superior to other people like CWC and to appear smarter than normal people.
He doesnt insult neil for two reasons:
1) He's genuinely doing better than him in terms of functionallity.
2) He didn't have all that much to do with him growing up, just by the very nature of his existance he's not social and he wasn't able to have anything close to a real relationship with him they where strangers living in the same house.
Exactly, Jackie held neil up as a bad example and morphed young Phil into thinking that EVERYTHING is a competition of abillitiy that's why he desperately trys to prove his superiority and having a easy yard stick like OPL and his own brother just make it easy for him to do so.
"I may not be perfect but at least i'm not this guy" - Phil's subconscious whenever he feel's inferior.