GI version 18 or 19c?

So we are heading towards migrating our current environment which is on the primitive version of 11.2.0.3. My personal idea is to upgrade to one of the latest versions of Grid Infrastructure. Either 18c or 19c.

As per your knowledge, experience and observation, which GI version is more stable?

One thing to keep in mind (a possible complication) is that the app vendor is not ready for database higher than ver 12.1.0.2. Which means whatever GI version we proceed with, the DB will still be 12.1

Suggestions please!

Thanks.

-Saad

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