OCBC roboadvisor vs DBS roboadvisor?

Can i say that the DBS roboadvisor portfolios (Global 'fast n steady) carries less risk, thus is safer but potential reward is less. Because most of the equity allocations buys into ALL companies in the index, example S&P500, Xtrackers MSCI Europe.

Whereas thematic portfolios in OCBC like US Tech Giants have like 15 holdings in companies like Apple etc. great companies but its concentrated, thus theres risk. But with this comes high reward.

So if im more ambitious, should i go for OCBC robo?