Bitcoin is far more trusted and secure - that's the difference between Bitcoin and the hundreds and hundreds of altcoins (including Bitcoin Cash). Oh and Bitcoin Cash is incredibly scammy with all its proponents just trying to convince people that it is actually Bitcoin and not Bitcoin Cash, which shows you just how much they believe in Bitcoin Cash when they know their only road to success is calling it Bitcoin instead of its actual name. Oh and 2 MB or 8MB doesn't matter at all in the long run because both of those are complete trash for global usage. Oh and Bitcoin has Lightning Network which is a lot better than having 8MB and no Lightning Network.

Therefore Bitcoin is better.