To give you a reference point. I have
Deviate claymore high pivot 170/180mm 435cs/460 reach
Trek session mid high pivot 200/200 445 cs465 reach
Crestline S180 VPP 180/180mm CS445/455 reach.
The big advantage of the mid and high pivots is that the rear grows and the bike becomes more stable and speed when diving deeper into its travel and more nimble when using less travel. They also feel the square edge hits as the rear wheel kind of climbs up and over the obstactle.
However wheelies and manuals are harder. My harderest to wheelie or manual bike I have is the claymore as the high pivot changes the cs as you pull for the manual. It makes for funky manualling. My easiest to manual bike is the crestline at 445 chainstay. That has a small amount of rearward path but not much.
When buying a high or mid pivot you really need to consider the sagged CS length. That is what you will actually be riding. My deviate is sags out to 445ish when seating getting to my ideal cs length. That matches the crestline cs length. The DH bike will sag out further and give me closer to 455 cs. That suits its use case of a high speed stable dh bike.
For you riding a small you need to consider of the 440 cs unsagged, closer to 450 sagged, is going to be too long and feel like a bus of a bike that isnt very playful and is pretty damn hard if not impossible to manual.
For a size small i've like to see 430,435cs at the longest on a mid or high pivot bike.