The floor plan looks similar in the listing photos either way, so the real question isn't which one is "nicer" — it's which set of trade-offs fits how you actually spend an evening.
A condo's maintenance fee pays for a pool, gym, and a manned or camera-monitored entrance, all bundled into the total monthly cost. An HDB flat skips that fee entirely, and skips the facilities with it — there's no shared gym to walk past on your way out.
Noise carries differently too: condos are usually built to a more consistent soundproofing standard, while older HDB blocks vary a lot flat to flat — worth an evening visit before signing, not just a daytime viewing.
Food and errands tend to favour HDB estates — a hawker centre and a wet market within a five-minute walk is common — while condos, especially newer ones, sit closer to a mall or MRT interchange instead.
Eligibility is the part people skip: renting an HDB flat as a foreigner (rather than a room) has its own rules that don't apply to condo rentals, so it's worth confirming before you get attached to a specific unit.