In reply to Joe G:
Overall, I would choose Beinn Fhionnlaidh. Main reason is I think that the last should be an easier all weather type one and if I’ve remember correctly that one is the easiest of the two in my mind if weather not ideal; also gives interesting views.
I say that partly as I’ve met a few where the planned finish didn’t go to plan, and every one was weather problems (mainly trying to do the remaining ones in too short a time frame prior to the last one). Never under estimate how the weather can change plans on the day and even the run up to ticking off the planned last few to allow compleation on the chosen one.
Assuming you have others to finish beforehand, I would suggest leaving time to catch up just in case before your last if the last one has to be on a set date. I was convinced by the ones where it didn’t go to plan to allow 6 weeks between my penultimate and the last one just in case.