No, it doesn't matter, for 99% of SOS.
The only SOS that might be an issue are ones that occur in the seas off Fire Island's west coast, and possibly Haven's south coast.
While they aren't supposed to spawn, there are still SOS that occur with coordinates that in Trammel are covered by the Volcano that arose with the Underworld/Abyss entrance. Those can only be done (or done easily) in Fel (I had one SOS that had to be done using a Rowboat in Trammel, because it was inside the remaining inlet going deep inside the volcano).
There might also be SOS that have difficulties with the different shapes of Ocllo and Haven, that might have to be done in Trammel, but I never actually checked to see if the spot where I had one was actually land in Fel or not (It would have been REALLY close if it wasn't).