I'll add my grain of salt here... been looking a lot through EVERY DAMN CELL MODEL and battery type.
Depends on what you look for and the space you can get. The maximum weight you aim for is important too.
If capacity is your only concern, you can easily get like 10S6Ah for under 800Gr of battery with Li-Ion cells, which you can't achieve with LiPo. But all our stuff requires big amp draws, be it burst or constant, and for that you need cells able to take it. LiPos deliver that. Some small capacity Li-Ion and some Lifepo4 cells do too.
Battery tech' guys in the main section of ES were disregarding amp draws as most rides don't go above 30Amps continuous. They said that many Li-Ion batteries, for example, can be pushed for quick burst close to 40A without a sweat.
I strongly disagree with this statement above, as nobody wants to swap periodically battery packs or see their packs go burn in fire. Plus not everybody has same riding areas, or goals. Overengineering is always a good safety for your ride. Note that materials inside cells can be prone to big failure above some temperatures, and each cell has a different optimal operating temp which you really DON'T want to go past.
So here is my advice for you no matter what cell model /chemistry / form you choose :
Size your pack according to your power requirement first, be it 1P/2P/3P/4P/5P to achieve your SAFE continuous discharge rating IN the cells rating, not burst rating, THEN try to reach the maximum capacity you seek in the limit or the cells you acknowledged as powerful enough.
This way you will obtain best of both world, quick reactive power, big capacity, limited voltage sag under load and long battery calendar.
