On phone so Zeppelin's
On tablet, but not at all forced to use an apostrophe (although the keyboard uses up half the height of the display, which is awkward) and really a spill-chucker/bord-wodger forces possessive but not plural of a semi-obscure word..? Meh. It was an aside. Never mind.
Blimps and Zeppelin's always return to earth in a storm. That isn't an option for Venus city. For decades we have had space craft that have operated in orbit just like an orbital city would. Just do more of the same. Higher orbit and bigger station. Then you can start using off world resources to grow.
They do because it is easy. A leaking venusblimp would be easiest to fix in flight. Easiest to
resupply in flight. Easiest to reach from orbit to assist or escape to orbit upon evacuation. "We do this thing, and the other things, not because they are easy but
we also do not make them harder than they need to be." To paraphrase.
A leaking orbital station would lose air quicker. It may be proof against storms (which we currently do not have enough data over, but 50km is likely to be less turbulent, and well above surface features) but it is more susceptible to random space-debris and a puncture of whatever kind can immediately escalate to a disaster, not merely a lingering problem. Especially if in a section stressed by centripetal/centrifugal forces as part of the necessary habitability of the station.
But design elements could be swayed by future information. Right now, the balance of probability is very much hypotjetical.