Totally agree. There is no 'this kind' of demon. They are all subject to the name of Jesus spoken in faith. Jesus established 'unbelief' as the subject of His comment to follow. So it's the unbelief, which is the root cause of the demon not coming out, not the assumption that it is some kind of special demon. What prayer is to our spirit, meditation is to our soul, and fasting is to our flesh. When we pray and fast regularly and consistently, it deals with the root cause of the demon not coming out, the unbelief. The problem is not what kind of devil we are addressing, but whether we are truly in faith when we are commanding it to come out.
There's many points to cover concerning this that make it even clearer, but this is the basics of it.