Vortez posted a review on the Logitech G513
A quote from the article:
Today we’re looking at the Logitech G513 gaming keyboard, packed with all of the wonderful features you expect, including RGB backlighting, 1ms response times, 26 key rollover, mechanical switches and an aluminium alloy construction.Logitech G513 Review
This time around, unlike the Logitech G413 that we looked at a year ago, there’s a choice of three distinct Romer-G mechanical keyswitches, tactile, linear or GX Blue. To compare them to the market leader, the tactile is akin to a Cherry MX Brown, linear is similar to a Cherry MX Red and the GX Blue is most like the Cherry MX Blue. Logitech have provided us with both the Linear and Tactile Romer-G switches to test.