Riku looks kinda dopey and not really like a CEO, it's hard to imagine this round-faced guy who dresses in tshirts manning a multi-million dollar company, he feels more like a PR puppet that someone else has placed there.
Yagoo on the other hand is much older (like 20-30 years riku's senior) he's not much more intimidating or impressive but he gives off this awkward aura of a highly technical and reserved middle-aged working man which inspires more confidence.
Yagoo just feels more like a real human to me, the dude has been pictured looking down or just not smiling a bunch of times and in videos you can see how socially awkward he really is by his body language. Riku is always smiling, always looking at the camera, every shot is premeditated and scripted, that subconsciously instills a sense of deceitfulness in people.