The question was bob when standing. I have puzzled and analysed a lot over front suspension bob while standing, and have come to the conclusion for the front at least it doesn't matter much as it doesn't waste energy. In fact I think the opposite, it saves a bit of energy compared to no front suspension. I can elaborate if anyone is interested.
The Moulton front when adjusted very compliant will bob a lot more than the Birdy, but it can be adjusted.
Rear suspension for both is pretty stiff so very little pedal-induced bob, not worth obsessing about. Both have their rear pivots close to the bottom bracket.