All three are excellent but for me its definitely the YoYo especially if money is no object.
The Noa is more luxurious in that its more enclosed, bigger seat, big hood. Its incredibly easy to open and close, and is very neat folded - they all are though. The basket can't hold much weight wise or shape wise because it will drag on the floor. There is a fair amount of flex / bounce in the pushchair, but its very stable and you can hang bags on the back and it doesnt tip.
Excellent TBH. The two flaws are the basket and also the low handles. We used the pull along handle once on holiday and that was ok, but I wouldn't see it as a selling point compared to being able to sling the YoYo on your back. The Nuna Pepp can be towed along as well and I suspect you could have the handle at a height to suit you when towing??
The Nuna Pepp - flatter, bigger but neat fold. I dont like zip reclines - the Yoyo toggle is soooo much simpler than trying to hold the weight of a child up whilst doing two zips up. The seat looks small, but its absolutely fine. The basket is nigh on useless - at least under the YoYo I can push my handbag and a lunchbox. The raincover is sttttuupppid. The harness though is what I really could not stand. Its a 5 piece jigsaw puzzle - chunky and small and fiddly. I can see why so many people only use 3 points but I like my children harnessed in safe where I can. It drove me mad when it was wet and cold trying to do it up in a rush. For that reason alone I sold it which is a shame because its really lovely to use and push, has a huge range of adjustability on the handlebar etc.
The YoYo - I have had loads of smaller pushchairs, and the YoYo is just fab. It's basic - yes - but its just right to nip from the car, or when you have two pushchairs in the boot. We often use a bigger pushchair for a day trip but then may use the YoYo to go out for dinner with as we can fold it under the table. The beauty is in the simplicity though and its something we choose to take when we dont want a bigger pushchair and just want to run into somewhere. We have however taken it out all day shopping, or even this weekend it went to a country park and was pushed across grass with our 4 year old in!! (not intentionally but it happened!) But I love that it can be slung over our shoulder, or it fits in the footwell of the car, or you can fold the top half ie handle down and it "disappears" under a table. The recline is a simple pull up and down and it works great. The hood is a bit high and the seat is a bit exposed. I did have a footmuff on for winter, but in the cold and wet I would use a bigger pushchair - so for this reason you may prefer something more substantial.
I did have all 3 here before Christmas and the Noa and Nuna got sold because I never used them once I got the YoYo. Both of the others were hard to let go because they are useful, great pushchairs. You really have the best three small pushchairs here to choose from, so to be honest, any should serve you well but choose by your need.