Those 20-25 dollar gloves are just gloves with wiring, bulbs, and batteries. They do not contain any physical microlights, they are not as bright, not good if you plan on gloving for a while, and run out of battery faster. However, if you are just getting started and don't want to pay too much money they are perfect beginners set. The wannabes have many different modes and look good enough to wow people.
If your looking into getting into gloving a lot and have the money I would look into maxlights or inovas, either are the best bang for your buck. They are exceptionally bright and have multiple different solid colors, 3 color combinations and other unique color combinations.
The maxlight is a big smaller width wise, but a little thicker than the inova. It has the option of putting on diffusers which give the light a bigger glow and adds to the effect of the light. The solid color maxlights cost $6-7, while the modified maxlights cost from $8-12 a light so for a full glove set it would cost around $60-$120 depending the which lights you purchase.
The inova is a wider, thinner than the maxlight, it is also very bright, but has a smaller light thickness. It is unmatched in battery consumption and has the longest battery life of any rave light out there. The solid inovas cost $7-$8.50, while moded inovas cost from $9-$12 a light. So a 10 fingered glove set would cost around $70-$120. Both inovas and maxlights come with batteries, but once they run out you have to purchase new batteries for the gloves, on
www.orbitlightshow.com the batteries are $5 for 10, it takes 2 batteries per light so if you have a 10 light glove set 20 batteries or $10 will replace all your batteries to brand new.
Check out
www.orbitlightshow.com they have both the $20 sets (wannabes) and many different microlight types dotz, maxlight, inova, photon freedom. They have the lowest prices online and with the promo code : poonednoob you can get 5% off and 1 free ultra bright microlight.
I personally have a all modified inova set, 12 moded inovas in total 1 for each finger, and 2 for palms. However, I would now recomend a maxlight set as they do have the rockin diffusers which give the light a extra kick effect. I purchased inovas before the maxlights were out so I didn't really have much of a choice

Hope this helps.