TPS3808: supervisor size

Hi, 

I have a customer who is working with the supervisor TPS3808G09DBVR which is SOT23_6 packaging.

They are looking for a device with smaller dimensions.

In the datasheet there is an option for WSON 2x2

He is a asking:

1. Do we have another supervisor recommendations with small footprint size? Availability is important for them.
2. If they work with the WSON, will there be any working differences except the size?

Thanks.