i dunno. this city can obviously afford to pay more cops then liberty city could.

more of a rich town. therefor more cops.
Thing is tho. they're a bit easier to lose i find then in GTA3.
like a couple cops start chasing me, i can run down an ally, onto a diff street then down a side streen, and they're not still right behind me like in GTA3. they take some time to find you.
plus theres more ways to get rid of them.
1, theres more of thoes police badge items you can run over to lower your wanted level.
2, you can change cloths, you could never do that in GTA3.
3, get your car repainted.
4, run in a building and hide out. (hey, it doesnt work all the time but its worked a couple for me. Just dont hide out in the club where the bouncers are or anything. they'll start chasing you too)