Solman upgrade and migration to cloud

Hi Gurus;

I am planning to upgrade my solution manager instance from 7.1 SP12 to 7.2 and also migrate it from Oracle 11.2.0.4 to Sybase ASE 15.7

But people are recommending doing a fresh install of Solma  7.2 on Sybase ASE

Which would be a better approach and why

Please assist

Thanks

Tushar