Neither is better than the other. People are basing their opinions on which they have owned, and what they have read.
Both guns will shoot 10.5bps at a consistent rate, both guns have a barrel, eye system, simple bolt system, boards and batteries. Both guns have Millennium settings, which are the same for both markers.
Basically, what Im saying is, which ever one you pick up and feels right in your hands, is the gun for you. They are both as reliable as the owner, and both companies have well stocked customer service teams and an office in the UK.