Its a great choice - the AT33PTG/II is a great cartridge - I actually prefer it to the more expensive OC9 series.
Compliance is not low - it is a little bit below medium - so should be fine on your TT.
Gain & Loading are very configurable on your Sutherland via internal DIP switches and from what I can see you should be able to configure it for the AT. They recommend 100ohms minimum, but you can experiment above this and use your own ear.
Best of luck, I've got a Nagaoka - the AT33 will be a significant upgrade.
It is a very smooth cartridge in terms of sound balance.