Might sound cheesy, but the whole "experience" of building this thing is far above everything FW produced in the past. And nice packaging also fits right in there. They continue what they started with the Horus Heresy Character Series, which also come in a very nice box where the unboxing itself gives the kit some kind of "worthiness" or however one would say that. Not like in the past "here's a bunch of plastic bags with stuff, here is a bad picture of how it should look in the end...good luck"
To be honest, I never spent any thought about building a second Warhound for example. It simply was not fun. I haven't event finished the Imperial Marauder bomber yet (since about six years), because after greenstuffing here and there and over there because NOTHING fit, I built other things which were more fun.
The Warlord? I'd build another one any time if I could. It's kinda like comparing the Forge World Baneblade (wouldn't build another one if somebody would pay me for it) to the GW plastic Baneblade.