The range and recommendations on which mic is suitable for a DJ is pretty obvious at almost every cost level. The product description and the wealth of online video content is enough to set most people on the right path. There's no one mic that does everything well, so we've got to know our job and learn all we can about good mic selection and application.
The first and most important thing is to understand what it is we do and how that dictates mic parameters. Are you standing in front of your PA as an emcee or dance instructor during loud dance music segments? Are you trying to talk over loud music? Do you have issues with people not being heard while giving speeches? Do the people often cause feedback? Have you no more headroom available to turn up the mic as needed? Do you have a mixer or other device capable of properly managing a mic or is just a "low and high" adjustment knobs?
There are times when we need more than one mic or more than one capsule to do everything well. It's not enough for a mic to reproduce sound well, because we also need a way to reject the sound we don't want. That is first accomplished with the right capsule. Everything downstream is merely shaping the sound you've already captured.
For example, about 20 of my QLXD mics are equipped with SM58 capsules, but 4 are SM87 and are very helpful in highly reverberate rooms when Q&A mics are out in the audience in front of or directly under the PA. It's also a good choice for a DJ/emcee working working out front and on a riser right between the PA speakers, but it would probably not work well for people giving a toast because they don't comnsistent;y hold it correctly, and tend to wander out of it's narrow field if it's in a stand.
For a Disc Jockey - any wireless mic from a Shure PGX to a QLXD and all things in between (including similar brands) will work perfectly well IF we know FIRST know how to resolve RF frequency and environemntal factors, and SECONDLY, practice good mic setup and processing skills. These two latter factors far outweigh the impact of what particular product you are using.
The Chinese knock of products are something to stay away from. (There are also a LOT of counterfeits.) These cheaper models are often not well planned with respct to frequency bands and it's important to know WHERE on the planet or even in you own city you are most likley to be uing them. The mics themselves are often lacking good shock protection, and the frequency range is not as wide or as stable at teh most common hot spots.