not OP, but if you have sleep apnea, you typically snore very loudly. You may not realize you're doing this because you're asleep and alone, but if you sleep with someone, they will definitely let you know something is wrong and a dr will tell you to get a CPAP machine.
It depends on the type. The most common type, Obstructive Sleep Apnea sounds way worse than loud snoring. If you've ever heard it, it's like the person is suffocating while they sleep (because they almost are).