With RH/IBM IBM certainly wants to leverage the RH brand and separate it a bit from the IBM brand, while leveraging customers and technologies across the company.
Suse's current owner won't have much synergies between Suse and their real estate business (except that Suse probably rents office space there) You don't do deals like "rent an apartment, get a Suse license for free" Thus Suse, under obersight can likely set their business strategy and objectives more freely.
SUSE is owned by EQT which is an investment organization. They basically provide the capital and resources to grow a business and then get out when it reaches a target. This is very different from IBM/Red Hat.
Sounds like something Red Hat could say too...