Did it have a cultivar name when you bought it? There are lyratas that grow compactly and columnar, this Google search using the keywords ficus lyrata compacta brought up these images:
https://www.google.ca/search?q...
Are the banana peels, egg shells, coffee grounds etc. composted or fresh? If not composted they aren't likely to work very well, especially if the plant is growing in soilless mix. But looking at the pictures of columnar Ficus lyrata I'm thinking the difference between that and your other one is more likely to do with being two different cultivars.
