I am currently running some Miracle Grow professional organics - Since its readily available...I typically use Bio Bizz Light Mix but the covid shit had me trying something I hoped would be comparable.
So far I've had 2 grows comparing MG to BBLM using some mephisto and fastbud strains. All germed properly but noticed the MG doesn't drain and dry nearly as well as BBLM so overwatering became a caution. using a moisture meter only for determining needs. This continued throughout veg and flower with MG needing about half as much as BBLM.
Personally, I've only used DI water for 2-3 weeks with both...growth was good on both with the MG behind in growth throughout lifespan. The MG is a lil hotter and needed very little in ferts...aamof showed a lil nitrogen toxicity throughout. As usual, MG is easily overwatered so be cautious about watering.
My end result is....I'll still use MG for odd strains just for shits and grins but it does required a lil different care schedule but glad my BBLM source is shipping again.