Dowler was on her own. He then used his flat.
The killer of the Russell's asked for money. Bellfield never did that.
I believe despite Bellfield being known as a bus stop stalker, ( his convictions involving hitting women over the head X2. And using a vehicle in the 2008 case, I believe he is an offender who doesn't have a particular modus operandi and he can adapt.
Milly Dowler was abducted from the street.
He also attacked a man. Best friend Peter Rodriquez by smashing him over the head with a hammer and leaving him for dead.
He is also suspected of killing his first victim in 1980 when he was 12. Patsy Morris an apparent comprehensive school girlfriend of his who was two years his senior.
He also apparently drugged young woman and teenage girls for sexual purposes. Apparently along with others. A 2016 report stating that he was part of a peodophile ring.
He was also an active OCD ( an ordinary decent criminal ) a law term, he was involved in petty crime fraud, violence etc et al. He had numerous previous convictions for a variety of offences.
A truly dangerous guy. I have no idea if he did the chillenden murders. I do suspect he is playing a game with authorites for kicks