What is the difference between METHYLprednisolone and just predniSOLone (no methyl in front)?

https://www.drugs.com/compare/methylprednisolone-vs-prednisolone

Methylprednisolone has a group of one carbon molecule and three hydrogen molecules, CH3, attached to the prednisolone compound. Methyl groups naturally circulate in our body to ensure biological processes work the way they are designed. I read a research study comparing the administration of prednisolone and methylprednisolone. To simplify the explanation, it showed that a specific dosage of methylprednisolone produced a more reliable targeted amount and timing of the drug in the bloodstream versus the comparable dosage of prednisolone.