nRF52811 vs nRF52832 current specs+ wake on LPCOMP?

Hi,

It seems that the nRF52811 for the most part draws less current the nRF52832.  For example:

nRF52811:   1.4 μA at 3 V in System ON mode, no RAM retention, wake on RTC

vs.

nRF52832:   1.9 μA at 3 V in System ON mode, no RAM retention, wake on RTC

Some questions:

Why does the nRF52811 draw less current?

Does Nordic make BLE IC's that draw even less current than the nRF52811 (or nRF52810)? 

Does the nRF52811 have a 'Wake on LPCOMP' feature? If so, what's the current draw? There's no mention of it on the spec sheet..

Thanks!

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