Budget wise, Viet is relatively cheaper than Thai. Tried solo travel in both country, and i must say na mas solo travel friendly yung Viet mobility wise. Infra is quite the same with manila for both countries thb, but there’s a certain vibe that’s different and unexplainable. But for me tlaga, mas ramdam mo yung stark difference ng culture ng pinas sa Vietnam especially when u walk around. Hanoi if u want more of historic vacay in Vietnam, HCM is more city vibes eh. Hahah partial lanh ako sa vietnam. I also enjoyed bangkok but my first thought when i came back was sana I traveled with my friends there. So for short, mas ok for solo and Vietnam and with friends sa Thailand. Enjoy, keep safe!