1TB Fusion Drive + Logic Pro?

Anyone's got any experience using Logic with an iMac with a 1TB fusion drive? Can't really find a lot of info on this. I'm currently using a 2015 MBP for logic, and it's been experiencing issues lately when I have more than 5 synth modules in place.

I'd go for a full SSD if I could, but the prices here in the Philippines are ridiculous. an upgrade to a 128GB SSD for the base non-retina 21.5in model alone costs $600. Looking to buy the top 4k 21.5 in model, btw.