score:2
The general (worldwide) trend is probably to extend VOA but since visa rules are in a constant state of flux buying a visa from a Consulate should provide some reassurance that you wonβt be declined boarding due to the withdrawal of a VOA facility. VOAs can be cheaper than visas via Consulates which are easy money, so not promoted as heavily (eg by visa agencies) β may account for some of your (understandable!) confusion.
Tanzania however is not trying to discourage tourists and the fees are the same either way ($50 for a German citizen).
Waits seem to vary roughly 15 minutes to 1 hour so if on a very tight timescale via Consulate might get you out of the airport a little sooner.
Note that Tanzania are fussy about the age and condition of notes if paying in USD β not an issue is buying the visa at a Consulate.
Also that VOAs for Tanzania are only valid for arrival at certain points of entry. Elsewhere there is no VOA option.
Also.
Upvote:2
It seems that regular visas and visa-on-arrival are more-or-less equivalent in Tanzania. The main difference is that citizens from a handful of (African) countries are not eligible for the visa-on-arrival and that such visas are only available at a limited number of designated port of entries (not at smaller airports or road borders).
But for a German citizen flying into a major international airport, it should not be an issue. I have no ideas about the practicalities (how long it takes at the airport, etc.)