I prefer the real since I see Oku as having more granulartity than what Uniswap.info can provide. Are the spikes not shown on Uniswap.info because the spikes are compacted into less ticks?
As for the blank ticks logically I would think that there would be no blank ticks considering LP's who have full range. If its the case of these ticks would never have liquidity, then maybe just have no gaps/dark spaces in the depth chart. When I cursor over the gaps it provides no tick information.
Also when clicking two point on the depth chart it highlights a range of liquidity A to B, it would be great if it summed up the liquitiy depth in that range. If it does this I am unsure where the highlighted section is giving information: