As already noted, each different job/class has stat pools that are independent of the others. ACN is the only hybrid class that has two different job paths, and even the option to do both by doing all the job quests to 60.

As a SMN and SCH you're going to naturally play one more than the other. I have a 60 SCH and SMN as well. If you're a casual player you can simply gear both jobs and switch back and forth as you like. The SMN gear set will pretty much make up the difference for the base stats you respecc'ed into Mind.

If you're a min/max player you can keep a stack of Keepers Hymns handy and reset your stats every time you switch from SCH to SMN or vice versa.

I have all the jobs, and I've got them all geared enough to do basic endgame content. It's nice to be able to jump in on whatever role is needed. But as you play, you find yourself narrowing in on the jobs you prefer most, and for me it's WAR, AST, and DRG, with a side helping of very casual BRD.