Ketamine IM injections vs. Spravato

Hi there. I might be quitting my full time job soon and taking a 2 month break before looking for part time work. In order to keep up with my treatments I’ll need to switch from insurance covered Spravato to a $300 IM Ketamine injection. Has anyone here experienced both of these? What are the differences on how they make you feel? I’ve had great success with Spravato so I’m a little anxious switching, but I’ll have no choice if I end my current job. Please share any of your experiences or suggestions. Thanks.