Pick one of these two destinations

Two places on the shortlist and no way to separate them.

I am choosing between two places for the same trip. Do not give me a balanced comparison.

Tell me the real difference between them in one paragraph, what I would give up either way, then pick one and name the single condition under which the other becomes correct. Be explicit about what you cannot know: weather, events, routes, prices.

Option A:
Option B:
Who is going and when:

Choosing and budgeting. Picking between options, planning around a hard constraint, and what the trip will really cost.