I agree with John and Jane. I have a new (one week old) KoAloha soprano with tenor neck and it has more sustain and is louder than the KoAloha soprano standard that I once owned. I can't speak to the concert, per say, as I have never owned that size. Bottom line: longer strings, more sustain. More sustain, better sound...to me.
http://www.theukulelesite.com/koaloha-soprano-tenor-neck-new-model.html
http://www.theukulelesite.com/koaloha-soprano-longneck-koa-w-hard-case.html
I got a tenor necked model (first link above) because I already own tenors and am familiar with that fret spacing. I wanted a soprano sound, though, hence the soprano body. I think it's a swell combination. Plus, and this is a minor point but one to consider, the price of the soprano with tenor neck is $60 more than the concert neck soprano, but at HMS, the tenor includes an Oahu hard shell case (value $90)...with the long neck you pay $30 extra for the Oahu case upgrade. So its an equal deal (roughly), if one wants either style neck to begin with, so price is not a big factor (at HMS).
The tenor fretboard is dark mahogany (not light colored like the concert), it has the new small black geared tuners, the flat fretboard end (not scalloped), and (key to me) the new KoAloha tie-bridge (rather than the knotted bridge--I dislike knotted bridges very much for the damage that can be done from the knot). So, those features alone sold me on tenor over concert neck soprano, before even talking about sustain, loudness and extra frets.
I thought the only downside would be head heavy, and it does balance out at the 8th fret (most tenors cannot balance on the fretboard at all--they are all body heavy), but it doesn;t seem to affect play or holding as much as I thought. It seems to balance well, and I am surprised by this. I generally use a strap, though, for all my ukuleles.
In the end, it's a personal call, certainly. And you mention Jake, who is small and has strong and fast hands like a bird of prey, but he plays a tenor...so it can be done, even for the best. Good if you can try a tenor anything versus a concert anything before buying to know how each would suit you, personally.