When I think of Tt Level 20, I think of thick aluminium panels. This carried over to the Level 20 GT RGB keyboard in the form of a 2 mm thick aluminium frame, and the higher-end Level 20 RGB keyboard is no different. The naming scheme is terrible in my opinion, with there being other Level 20 (GT) RGB products from Thermaltake as well, but it is what it is. My issue with the thick aluminium frame being marketed as a big selling point is that in 2020 there are so many keyboards that boast using a variety of aluminium frames that this alone does not sell itself anymore. If anything, the keyboard is larger than it needs to be, but it does try to justify this with the provision of dedicated media controls and USB + audio pass-through. The option of a Razer Green switch is fairly unique outside of Razer keyboards, and the Razer edition supports so many different software programs that it counts as both a plus and a minus in my books, especially when some of them require a specific set of other products, and others yet barely work well enough to count.
A lot of what I said about the Level 20 GT RGB keyboard is equally valid here, as the two share a lot of common DNA. The non-GT version just kicks things up a notch or two in the lighting department with more and updated hardware LED drivers. This allows the keyboard to have the same 16.8 M per-key RGB backlighting as the GT variant, but with an extra 38 lighting zones around and on top of the keyboard, with a diffusing white plastic layer in between for a nice light show if you want it. The keyboard checks off a lot of boxes in the makings of an attractive keyboard in this crowded peripheral market and is arguably a better buy than the GT variant with the $20 (less on sale) increase for the respective switch. In addition, you get a second color option for the frame here that does not exist with the Level 20 GT RGB keyboard. This particular Cherry MX Blue RGB version comes in at $140 before any sales/discounts and, as with the Level 20 GT RGB keyboard, the $130 Razer Green version is a decent buy assuming the switches themselves are to your liking and don't worsen tangibly with use.