Ling ~ im agree with what you said. I did heard from my boss before too! But i cant recall the where is it.
Actually not really important for me, i would say if you wanna sell the unit to earn profit, FREEHOLD of course have the advantages while leasehold tends to have lower capital appreciation. And the procedure of selling is much more easier and not as time consuming as leasehold.
If you are renting out to cover your mortgage, no any affect i would say. IF you are buying for own stay, not really big issue also. Unless you are thinking for your children future home, then of course freehold will be better.