So let us walk past each and every aspect one by one:
History - Fergusson College was established way back in 1885 and Bal Gangadhar Tilak was one of the founding members of the college. It has also contributed men to the freedom struggle and has a lot of history and prestige attached to it. On the other hand, Symbiosis was established in 1970s and recently completed its 50 years of operation. So a lot less prestige and definitely a lot less history than Fergusson!

Infrastructure - Fergusson Colleges, like many old colleges is built in an area of 65 acres. It has a lot of new and old buildings and departments. On the other hand, Symbiosis like every recent college is not so big. So guys and gals, looking out for some quality campus life, watch out! Yes, it has big canteens than Fergusson but lacks in restaurants nearby.

Sports- Fergusson has a lot of indoor and oudoor complexes whereas Symbiosis lacks on that heavily!
Alumni- 125 years of prestige and alumni base is what Fergusson offers, whereas Symbiosis being newer has its own cons.

Decision is yours.